- 1 How long does it take for Ultracal 30 to set?
- 2 What is the difference between Hydrocal and Ultracal?
- 3 What Ultracal 30?
- 4 Is Ultracal 30 waterproof?
- 5 What is Hydrocal made of?
- 6 What is Ultracal made of?
- 7 Can you sand Hydrocal?
- 8 How hot does Ultracal 30 get?
- 9 What is Hydrocal?
- 10 What is gypsum powder?
- 11 Is hydrostone waterproof?
- 12 How do you mix Ultracal?
- 13 Is gypsum a cement?
How long does it take for Ultracal 30 to set?
ULTRACAL 30 Set Time is 25-35 minutes. De-Mold Time 60-80 minutes. Mix Ratio: 38 parts water to 100 parts plaster.
What is the difference between Hydrocal and Ultracal?
Ultracal 30 is more dense and harder than Hydrocal and is advertised by USG as a tool making plaster. Hydrocal is a casting plaster that hold detail well. Hydrocal is easier to work with post casting for corrections. Ultracal is more durable.
What Ultracal 30?
USG ULTRACAL 30 is a low-absorption gypsum cement for case molds. Specially made for close-tolerance tooling – provides the greatest hardness, accuracy and freedom from efflorescence of any gypsum cement on the market. It has the lowest expansion of any rapid-setting gypsum cement available.
Is Ultracal 30 waterproof?
Quick setting, dense white plaster in water resistant bag. Ideal for patterns, figurines, commercial casts, and sculpture. It is not for making outer or mother molds, and it is not recommended for outdoor use.
What is Hydrocal made of?
Hydrocal is a US Gypsum product composed mainly of plaster of Paris and a small amount of Portland cement. Hydrocal, like its similar formulas Hydrostone, Ultracal, Duracal and others are all used for casting sculptures and other art objects as well as molds.
What is Ultracal made of?
USG ULTRACAL® 30 gypsum cement is a traditional casting gypsum cement, specially formulated for close tolerance tooling.
Can you sand Hydrocal?
Hydrocal – Ideal for casting lifecast faces, heads, and torsos from alginate molds. Hydrocal is very strong but still retains some of the working properties specific to plaster. May be sanded and refined with steel tools. Great for mother molds and support shells.
How hot does Ultracal 30 get?
The maximum temperature at which USG Ultracal 30 Gypsum Cement molds are safe from calcination is 120 °F (49 °C). With substantial free water in the mold, a higher drying temperature can be used initially without difficulty.
What is Hydrocal?
Hydrocal White is a multi-purpose gypsum cement ideal for both solid and hollow casting of lamp bases and figurines. Designed for thin sections, its high green strength minimizes breakage during removal from the most intricate molds.
What is gypsum powder?
Gypsum powder is a natural product found in deposits throughout the United States. It begins as a soft, white mineral rock and is processed to make a dry powder. Gypsum powder is mainly used in building materials such as drywall, but it is also useful in agriculture as a soil fertilizer and conditioner.
Is hydrostone waterproof?
Quick setting, lightweight white plaster in water resistant bag. Hydrostone is 40% to 50% harder than casting plaster and works much like plaster in mixing, pouring, and setting.
How do you mix Ultracal?
The instructions I have suggests that the mix ratio is 38 parts water to 100 parts Ultracal 30 by weight. Setting time is an average of 25-30 minutes when mixed manually. Do not mix with your hands.
Is gypsum a cement?
Gypsum is called the retarding agent of cement which is mainly used for regulating the setting time of cement and is an indispensable component. Without gypsum, cement clinker can condense immediately by mixing with water and release heat.