#plaster — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #plaster, aggregated by home.social.
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Here's a question for potters and/or chemists and probably a lot of other people too.
Pottery plaster is mixed with water at a 10 to 7 ratio. That is e.g. a kilogram of dry plaster wants 700 grams of water. Similarly a basic recipe for refractory molds for glass casting is half dry pottery plaster and half silica flour with a dry ingredient to water ratio of 3 to 2.
The problem lies in predicting the volume of liquid plaster produced from a given amount of water and dry plaster. There's a lot of miscibility going on and it's not even close to the sum of the volumes. Andrew Martin* has a recipe that gives one quart of wet plaster and using the ratio it's easy enough to scale it up or down as needed. But there's no such recipe for the glass casting mix, and anyway using a recipe bothers me to some extent -- e.g. how will I figure amounts if I want to fiddle around with the ratio?:What I'm looking for is a direct way from "I need x milliliters of wet mix so I should use y milliliters of water" and then use the ratio to calculate the amount of powder.
So what occurs to me is this: barring technical and irrelevant details like elevation about sea level and air temperature the specific gravity (= weight in grams of one CC) of each of these two mixes ought to be constant. Suppose way pottery plaster has a specific gravity d. Then if I need e.g. v cubic centimeters of mix I know I need vd grams of mix. If w is the amount of water I need and p is the amount of plaster, both in grams, then we should have:
w+p=vd
7p=10wSo 0.7p=w and therefore p=vd/1.7 and w=0.7vd/1.7.We can do something analogous with the plaster/silica recipe. A formula like this would be much easier to work with since d is constant so I could get the amounts directly with just two calculations.
My question is: will this work? I'm worried a little about the assumption that the weight of the wet mix is the sum of the weights of the ingredients. There's some kind of chemical reaction happening with the water and the plaster and it wouldn't be all that strange if some weight was gained or released at that stage e.g. if some atoms are related or absorbed. The thought of mixing and measuring accurately enough is daunting so I thought I'd ask fedi!
*If you want to learn slipcasting Andrew Martin's book The Essential Guide to Mold Making & Slip Casting is fantastic.
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Here's a question for potters and/or chemists and probably a lot of other people too.
Pottery plaster is mixed with water at a 10 to 7 ratio. That is e.g. a kilogram of dry plaster wants 700 grams of water. Similarly a basic recipe for refractory molds for glass casting is half dry pottery plaster and half silica flour with a dry ingredient to water ratio of 3 to 2.
The problem lies in predicting the volume of liquid plaster produced from a given amount of water and dry plaster. There's a lot of miscibility going on and it's not even close to the sum of the volumes. Andrew Martin* has a recipe that gives one quart of wet plaster and using the ratio it's easy enough to scale it up or down as needed. But there's no such recipe for the glass casting mix, and anyway using a recipe bothers me to some extent -- e.g. how will I figure amounts if I want to fiddle around with the ratio?:What I'm looking for is a direct way from "I need x milliliters of wet mix so I should use y milliliters of water" and then use the ratio to calculate the amount of powder.
So what occurs to me is this: barring technical and irrelevant details like elevation about sea level and air temperature the specific gravity (= weight in grams of one CC) of each of these two mixes ought to be constant. Suppose way pottery plaster has a specific gravity d. Then if I need e.g. v cubic centimeters of mix I know I need vd grams of mix. If w is the amount of water I need and p is the amount of plaster, both in grams, then we should have:
w+p=vd
7p=10wSo 0.7p=w and therefore p=vd/1.7 and w=0.7vd/1.7.We can do something analogous with the plaster/silica recipe. A formula like this would be much easier to work with since d is constant so I could get the amounts directly with just two calculations.
My question is: will this work? I'm worried a little about the assumption that the weight of the wet mix is the sum of the weights of the ingredients. There's some kind of chemical reaction happening with the water and the plaster and it wouldn't be all that strange if some weight was gained or released at that stage e.g. if some atoms are related or absorbed. The thought of mixing and measuring accurately enough is daunting so I thought I'd ask fedi!
*If you want to learn slipcasting Andrew Martin's book The Essential Guide to Mold Making & Slip Casting is fantastic.
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What's an equivalent product of Knauf Gigamit that I can a) buy regionally and b) isn't from a Russia supporter?
This is an exterior "Sockel" plaster that can be used directly on XPS panels (while also embedding glass reinforcement) without needing another layer on top (or a glue layer below). Just one layer. Saves a lot of work.
So who else makes this?
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What's an equivalent product of Knauf Gigamit that I can a) buy regionally and b) isn't from a Russia supporter?
This is an exterior "Sockel" plaster that can be used directly on XPS panels (while also embedding glass reinforcement) without needing another layer on top (or a glue layer below). Just one layer. Saves a lot of work.
So who else makes this?
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I was flattered when "Ikea tips, hacks and more" reshared my refinished attic posting, several years ago on facebook. #refinished #sanding #refinishingfloors #wallboard #plaster #plastering #painting #storing #archiving #organizing #attic #attics #oldhouse #oldhouses #ikea #oldhome #oldhomes #colonialhome #colonialhomes #victorianhome #victorianhomes #library #book #books #tips #hacks #tip #hack #resharing #reshare #internet #internetconnection
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I was flattered when "Ikea tips, hacks and more" reshared my refinished attic posting, several years ago on facebook. #refinished #sanding #refinishingfloors #wallboard #plaster #plastering #painting #storing #archiving #organizing #attic #attics #oldhouse #oldhouses #ikea #oldhome #oldhomes #colonialhome #colonialhomes #victorianhome #victorianhomes #library #book #books #tips #hacks #tip #hack #resharing #reshare #internet #internetconnection
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NOTE: As someone pointed out, this is a DANGEROUS process and requires a lot of safety precautions. I would refer to other instructions with more safety measures. I posted this more for the uses of #Lime (as opposed to using tons of chemicals).
Burn #Seashell #Lime in a Primitive Straw/Clay #Kiln!
By skillcult
"In this project we use Earth, Water, Fire, Air, Animal, Vegetable and Mineral to make something with a multitude of practical uses. The text is detailed and stands alone, but the videos are very useful and entertaining. Video #1, the Quicky version, is the 7 minute general interest, entertainment version. Video #2, buildcult, is the long educational 20 minute version. I'd recommend watching the short version first, before reading this instructable, so that you have a visual reference. I did my best to make it worth 7 minutes of your life. I conceived this project for the Brave the Elements contest, which you can vote in here, hint hint.
"The goal is to build a kiln from natural materials in order to burn and slake #lime for #seashells. Lime is immensely valuable! If lime disappeared tomorrow, civilization would fall hard! It is the main ingredient in cement and can be used to make #mortar and #plaster. It can also be used in the arts for #limewash and fresco, in #Soapmaking, mixed with casein (milk protein) to make #PreIndustrial waterproof #glue and #paint, for smelting and refining metal, and to remove hair and prepare skins for rawhide, hide glue or tanning. Ever read the ingredients on your tortillas or tortilla chips and seen 'traces of lime'? That’s because lime is used in processing #corn kernels to make tortillas, hominy and grits, which is easy to do at home. Not only does it make corn more nutritious and digestible, but it also lends to the unique flavor of those products. Beet sugar is processed with lime too. Lime is also used to potentiate certain drug substances such as betel nut and coca leaves, a small bit of lime being chewed with the plant material to activate it. So, yeah, wow, lime is one of the most useful substances ever!
"A WORD ON SAFETY: A lot of people think that lime is some deadly scary chemical that will burn you face off. It’s not… not really... well, maybe. #QuickLime is dangerous, but that is a brief transient state. During #slaking, the quicklime will give off heat and boil vigorously, so that is dangerous since the stuff can splatter around and is not only hot, but also highly alkaline. So, yeah, okay, maybe doing a face plant in a boiling tub of quicklime may burn your face off. Don’t do that! Otherwise, the stuff is not that horrible, and people have been making #tortillas, mixing mortar, plastering walls and tanning leather without goggles and hazmat suits for a very long time. It is also non-toxic. You definitely don’t want your pets drinking lime water or your kids playing with lime, but that is due to it’s concentration mostly, and not to inherent toxicity. When diluted, it becomes less and less caustic and is at some point completely harmless. Once converted to #CalciumCarbonate by drying, it’s just like egg shells, sea shells or stone, not only non-toxic, but actually used as a #calcium supplement. So, don’t get it in your eyes, keep it away from children and pets, be careful when slaking and use common sense and everything will be fine. It will temporarily dry skin though skin though, so be aware of that.
"Before we get to the fun stuff, let me explain how this works. Don’t be intimidated by the chemistry terms, they aren’t important. The changes lime goes through have a name, The Lime Cycle. By heating stone or shells red hot, about 900 Celcius (called calcining), we can change lime from it’s stable inert form, calcium carbonate, into #Calciumxide. Calcium oxide, aka Qucklime, is the most unstable and highly reactive form of lime. Quicklime reacts violently with water, giving off tremendous heat and boiling vigorously. This reaction with water makes it into #CalciumHydroxide, which is similar to #lye, but not as strong. This is the form that is used the most in the arts and industries mentioned above. If the lime is kept under a layer of water, it will not only keep forever, but it improves with age! This stuff is called lime putty. You may be more familiar with the dry lime you can buy in a bag, which is dry calcium hydroxide. This bagged powdered #HydratedLime is widely available, but inferior to wet #SlakedLime putty. You can hardly buy lime putty, and it is very expensive, but you can make it! For more on the forms of lime see my article, Understanding Lime.
"Basically, #LimePutty is like liquid rocks. Once it is allowed to dry with exposure to air, it absorbs carbon from the atmosphere and turns back into a hard rock (or shell, which is pretty much the same thing). Think about that for a second. That is awesome!
"And thus the lime cycle is completed from rock or shell, to quicklime, to lime putty, and back to rock/shell.
"In my book, it doesn't get much funner than burning and slaking lime, so lets get this party started!"
Learn more:
https://www.instructables.com/Burn-Seashell-Lime-in-a-Primitive-StrawClay-Kiln/#SolarPunkSunday #OldTech #LowTech #LoTech #DIY #TraditionalTechnology
#AncientTechnology #CalciumCarbonate #TraditionalMortar #History #HistoricalMethods #OldTech #SeashellLime -
NOTE: As someone pointed out, this is a DANGEROUS process and requires a lot of safety precautions. I would refer to other instructions with more safety measures. I posted this more for the uses of #Lime (as opposed to using tons of chemicals).
Burn #Seashell #Lime in a Primitive Straw/Clay #Kiln!
By skillcult
"In this project we use Earth, Water, Fire, Air, Animal, Vegetable and Mineral to make something with a multitude of practical uses. The text is detailed and stands alone, but the videos are very useful and entertaining. Video #1, the Quicky version, is the 7 minute general interest, entertainment version. Video #2, buildcult, is the long educational 20 minute version. I'd recommend watching the short version first, before reading this instructable, so that you have a visual reference. I did my best to make it worth 7 minutes of your life. I conceived this project for the Brave the Elements contest, which you can vote in here, hint hint.
"The goal is to build a kiln from natural materials in order to burn and slake #lime for #seashells. Lime is immensely valuable! If lime disappeared tomorrow, civilization would fall hard! It is the main ingredient in cement and can be used to make #mortar and #plaster. It can also be used in the arts for #limewash and fresco, in #Soapmaking, mixed with casein (milk protein) to make #PreIndustrial waterproof #glue and #paint, for smelting and refining metal, and to remove hair and prepare skins for rawhide, hide glue or tanning. Ever read the ingredients on your tortillas or tortilla chips and seen 'traces of lime'? That’s because lime is used in processing #corn kernels to make tortillas, hominy and grits, which is easy to do at home. Not only does it make corn more nutritious and digestible, but it also lends to the unique flavor of those products. Beet sugar is processed with lime too. Lime is also used to potentiate certain drug substances such as betel nut and coca leaves, a small bit of lime being chewed with the plant material to activate it. So, yeah, wow, lime is one of the most useful substances ever!
"A WORD ON SAFETY: A lot of people think that lime is some deadly scary chemical that will burn you face off. It’s not… not really... well, maybe. #QuickLime is dangerous, but that is a brief transient state. During #slaking, the quicklime will give off heat and boil vigorously, so that is dangerous since the stuff can splatter around and is not only hot, but also highly alkaline. So, yeah, okay, maybe doing a face plant in a boiling tub of quicklime may burn your face off. Don’t do that! Otherwise, the stuff is not that horrible, and people have been making #tortillas, mixing mortar, plastering walls and tanning leather without goggles and hazmat suits for a very long time. It is also non-toxic. You definitely don’t want your pets drinking lime water or your kids playing with lime, but that is due to it’s concentration mostly, and not to inherent toxicity. When diluted, it becomes less and less caustic and is at some point completely harmless. Once converted to #CalciumCarbonate by drying, it’s just like egg shells, sea shells or stone, not only non-toxic, but actually used as a #calcium supplement. So, don’t get it in your eyes, keep it away from children and pets, be careful when slaking and use common sense and everything will be fine. It will temporarily dry skin though skin though, so be aware of that.
"Before we get to the fun stuff, let me explain how this works. Don’t be intimidated by the chemistry terms, they aren’t important. The changes lime goes through have a name, The Lime Cycle. By heating stone or shells red hot, about 900 Celcius (called calcining), we can change lime from it’s stable inert form, calcium carbonate, into #Calciumxide. Calcium oxide, aka Qucklime, is the most unstable and highly reactive form of lime. Quicklime reacts violently with water, giving off tremendous heat and boiling vigorously. This reaction with water makes it into #CalciumHydroxide, which is similar to #lye, but not as strong. This is the form that is used the most in the arts and industries mentioned above. If the lime is kept under a layer of water, it will not only keep forever, but it improves with age! This stuff is called lime putty. You may be more familiar with the dry lime you can buy in a bag, which is dry calcium hydroxide. This bagged powdered #HydratedLime is widely available, but inferior to wet #SlakedLime putty. You can hardly buy lime putty, and it is very expensive, but you can make it! For more on the forms of lime see my article, Understanding Lime.
"Basically, #LimePutty is like liquid rocks. Once it is allowed to dry with exposure to air, it absorbs carbon from the atmosphere and turns back into a hard rock (or shell, which is pretty much the same thing). Think about that for a second. That is awesome!
"And thus the lime cycle is completed from rock or shell, to quicklime, to lime putty, and back to rock/shell.
"In my book, it doesn't get much funner than burning and slaking lime, so lets get this party started!"
Learn more:
https://www.instructables.com/Burn-Seashell-Lime-in-a-Primitive-StrawClay-Kiln/#SolarPunkSunday #OldTech #LowTech #LoTech #DIY #TraditionalTechnology
#AncientTechnology #CalciumCarbonate #TraditionalMortar #History #HistoricalMethods #OldTech #SeashellLime -
Burning #SeaShells to make #quicklime
Posted on November 10, 2018 by Per Storemyr
"Burning seashells to make quicklime once was a great tradition in the #NorthAtlantic region. In Millstone Park, Hyllestad (W-Norway), we have built two #limekilns, reviving old lime burning traditions, involving #craftspeople, volunteers and the public. Recently we burnt sea shells to make #LimePaint and #mortar! Read about the experiment in a new poster and web article."
https://per-storemyr.net/2018/11/10/burning-sea-shells-to-make-quicklime/
#SolarPunkSunday #TraditionalTechnology #AncientTechnology #Romans #Vikings #CalciumCarbonate #TraditionalMortar #Plaster #Paint #Limestone #Marble #History #HistoricalMethods #LowTech #OldTech
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Burning #SeaShells to make #quicklime
Posted on November 10, 2018 by Per Storemyr
"Burning seashells to make quicklime once was a great tradition in the #NorthAtlantic region. In Millstone Park, Hyllestad (W-Norway), we have built two #limekilns, reviving old lime burning traditions, involving #craftspeople, volunteers and the public. Recently we burnt sea shells to make #LimePaint and #mortar! Read about the experiment in a new poster and web article."
https://per-storemyr.net/2018/11/10/burning-sea-shells-to-make-quicklime/
#SolarPunkSunday #TraditionalTechnology #AncientTechnology #Romans #Vikings #CalciumCarbonate #TraditionalMortar #Plaster #Paint #Limestone #Marble #History #HistoricalMethods #LowTech #OldTech
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Sculpture, Bust, Unknown
A bust of a woman wearing a shawl draped over her head and shoulders.
Te Hikoi Museum via DigitalNZ -
i wonder if #plaster is oven safe, and how well it works with #polymerclay? might be useful for creating support surfaces for irregular polymer clay shapes, or an alternative to foil for interior structures
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i wonder if #plaster is oven safe, and how well it works with #polymerclay? might be useful for creating support surfaces for irregular polymer clay shapes, or an alternative to foil for interior structures
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Layers of colored sgraffito on the Parroquia San Felipe Neri #baroque #church in #Malaga
#Sgraffito was a relatively cheap decorative technique of scratching through a #plaster to an underlying layer of contrasting color.
#pattern #decoration #architecture #histodons #Andalucia #ornaments #fresco #malteseCross #Spain
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Layers of colored sgraffito on the Parroquia San Felipe Neri #baroque #church in #Malaga
#Sgraffito was a relatively cheap decorative technique of scratching through a #plaster to an underlying layer of contrasting color.
#pattern #decoration #architecture #histodons #Andalucia #ornaments #fresco #malteseCross #Spain
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Free asset Alert: Plaster 48 | #Plaster
Download: https://www.sharetextures.com/textures/plaster/plaster-48
#b3d #3dmodelling #textures #free -
Free asset Alert: Plaster 47 | #Plaster
Download: https://www.sharetextures.com/textures/plaster/plaster-47
#b3d #3dmodelling #textures #free -
Free asset Alert: Plaster 46 | #Plaster
Download: https://www.sharetextures.com/textures/plaster/plaster-46
#b3d #3dmodelling #textures #free -
Free asset Alert: Plaster 45 | #Plaster
Download: https://www.sharetextures.com/textures/plaster/plaster-45
#b3d #3dmodelling #textures #free -
لزقة النمر Tiger plaster.. بالأرقام الدواء تحذر من استخدام تلك التشغيلات
https://misryoum.com/lzqh-alnmr-tiger-plaster-balrqam-aldwaa-thdhr-astkhdam-tlk-altshghylat/
حذرت هيئة الدواء المصرية، من استخدام مجموعة من التشغيلات الخاصة بـ لزقة النمر Tiger plaster، وذلك في إطار دورها التوعوي والتثقيفي لضبط سوق الدواء المصري. ووجهت هيئة الدواء في منشورها الذي حمل رقم “5” لعام 2026، من سحب تشغيلات أرقام...
https://misryoum.com/?p=107966
#لزقة #النمر #Tiger #plaster #بالأرقام #الدواء #تحذر #استخدام #تلك #التشغيلات #منصة_مصر_اليوم_الاخبارية #misryoum_com
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Poliüretan Plaster Korint Sütun Başlıkları Hafif ve Sağlamdır
🌐 polure.com
#polure #poliüretan #poliüretansütun #sütunbaşlığı #korintsütun
#plaster #poliüretandekorasyon #mimaridekorasyon #içmekan
#dışmekan #kartonpiyer #söve #3Dproje #dekorasyonçözümleri
#HomeDesign #HomeDecor #InteriorDesign #InteriorDesigner #Interiors
#InteriorDecoration #ExteriorDesign #DecorIdeas #Decor #Decoration
#Architecture #Architectural -
Poliüretan Plaster Korint Sütun Başlıkları Hafif ve Sağlamdır
🌐 polure.com
#polure #poliüretan #poliüretansütun #sütunbaşlığı #korintsütun
#plaster #poliüretandekorasyon #mimaridekorasyon #içmekan
#dışmekan #kartonpiyer #söve #3Dproje #dekorasyonçözümleri
#HomeDesign #HomeDecor #InteriorDesign #InteriorDesigner #Interiors
#InteriorDecoration #ExteriorDesign #DecorIdeas #Decor #Decoration
#Architecture #Architectural -
Free asset Alert: Plaster 44 | #Plaster
Download: https://www.sharetextures.com/textures/plaster/plaster-44
#b3d #3dmodelling #textures #free -
Free asset Alert: Plaster 43 | #Plaster
Download: https://www.sharetextures.com/textures/plaster/plaster-43
#b3d #3dmodelling #textures #free -
Free asset Alert: Plaster 42 | #Plaster
Download: https://www.sharetextures.com/textures/plaster/plaster-42
#b3d #3dmodelling #textures #free -
Design Milk : Gunter & Co Design Light-Filled London Arts and Crafts Residence https://design-milk.com/gunter-co-design-light-filled-london-arts-and-crafts-residence/ #LondonArtsandCrafts #bespokefurniture #InteriorDesign #CharlesBurnand #interiordesign #UnitedKingdom #GunterandCo #prayerspace #residential #Edwardian #Emperador #Gunter&Co #glassart #England #pendant #plaster #London #house #India #Main
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♉♋ The Zodiac Room, inside an abandoned mansion in Portugal
On the upper floor of this collapsing house, a spacious white room features a vaulted ceiling. Each ornate rib that traverses the vault carries a different zodiac symbol, sculpted out of moulded plasterwork.
#Photo #Abandoned #Zodiac #Abandoned #Plaster #Craft #Urbex #AbandonedHouse #Portugal
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♉♋ The Zodiac Room, inside an abandoned mansion in Portugal
On the upper floor of this collapsing house, a spacious white room features a vaulted ceiling. Each ornate rib that traverses the vault carries a different zodiac symbol, sculpted out of moulded plasterwork.
#Photo #Abandoned #Zodiac #Abandoned #Plaster #Craft #Urbex #AbandonedHouse #Portugal
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I want to show you my first beta test of the re-engineered 9" tall figurine mold. Can you guess I was a bit angry?
She's the Warrior Queen, Lady of Sovereignty and Victory in Battle.
The comet on Her reverse side is the harbinger of the fall of empires, and the new reality is in her womb.
To order a bespoke copy, you can follow this link: https://artisans.coop/products/warrior-queen She can be in any color, too!
#Crafts #Art #Plaster #MixedMedia #FediGiftShop #FediArt #MastoArt #Handmade #HandCrafted #NotAI
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This Friday's art appreciation moment is Joan Baez, 2015, by Alan LeQuire as seen at The Parthenon, Nashville, TN, US. #art #artist #sculpture #plaster #JoanBaez #TheParthenon #Nashville #FridayArtAppreciationMoment
