Is it safe to use for dental impressions for forensic analysis in a high school lab?

I do not believe that this product is a dental grade alginate which is what you will need. Try this http://www.amazon.com/Hollywood-Impressions-Molding-Powder-Alginate/dp/B000KI6W5Y/ref=sr_1_1?ie=UTF8&qid=1398300899&sr=8-1&keywords=dental+impression+kit

How many whole adult hand casts could you make with one box?

Most probably three or four possibly more, depending upon how closely the casting container is made and how far up the arm the casting is to be made. You have to be a bit careful of having the alginate too thin particularly at the edges where you transition from the casting to air. it can and will tear if it is too thin. You might be able to make a dozen or so casting if you simply paint the alginate onto The hand and then reinforce the cast with plaster of paris. I've heard of this method, but, have not tried it.

I want to make a mold of 16 different 4 year old's hands. How much of this stuff will I need if I'm using 1/2 gallon containers for each one?

Well if your using 1/2 gallon containers. Your mixture rate is 1:1 . that is 1 cup alja safe 1 cup water. So you need to probably use for each cast 3 to 4 cups alja safe and 3 to 4 cups water. 16 casts you would probably need about 9 pounds of alja safe.

How much heat alija safe can tolerate when casting?

If casting material reaches the boiling point of water, the moisture in the Alja Safe will convert to steam, causing bubbles in your casting.

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🛠️ Mold like a pro, safely and swiftly!

EFFORTLESS MIXING - Just add water and mix for a smooth, hassle-free molding experience.
SKIN SAFE FORMULA - Gentle, non-toxic alginate free from harmful crystalline silica for worry-free use.
QUICK SET DEMOLD - Fast 8-minute working time and 10-minute demold speed keep your projects moving.
STABLE MOLD STRUCTURE - No collapsing or distortion—your molds stay perfect until casting.
PRECISION DETAIL CAPTURE - Get ultra-accurate molds that preserve every fine line and contour.

Smooth-On Alja-Safe Alginate is a skin-safe, crystalline-silica free molding powder designed for fast, precise body molds. With an 8-minute pot life and 10-minute demold time, it delivers stable, high-detail molds that resist collapse, perfect for professional-quality temporary molds and reproductions.

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Product Dimensions	20.32 x 20.32 x 20.32 cm; 1.36 kg
Item model number	SOaljasafe3lb
Batteries Required?	No
Batteries Included?	No
Material Type(s)	Alginate
Color	Pink
ASIN	B000KVSU60

Smooth-On 1 X Alja-Safe Alginate 3-lb Box , Inc.

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