Aldax Craftcast 75D when Resin mold casting into latex moulds.
This is a polyurethane resin that sets to a white,
hard, rigid plastic in 3 minutes and can be taken from the mould in 10
minutes. It is ideal for casting a wide range of items from figurines
to vintage car accessories, toy train parts, model aeroplane parts,
jewellery and rigid plastic components of all kinds.
It has none of the objectionable smell of polyester resins, which must
be cast in well ventilated areas. Resin mold casting with CraftCast 75D
is easy with its two part mixing with equal volumes of resin and hardener. This
necessity of owning expensive weighing equipment so often necessary
with resin mold casting.
Due to the rapidity of the setting time of this resin it is essential
to have everything ready before you start. Remember the warmer the room
the faster the reaction and this applies to the resin itself. One way
to slow things down is to cool the resin in a refrigerator prior to
" Disposable glass or plastic mixing containers and measuring
" Disposable wood or plastic stirring sticks
" Paper towels and newspapers to cover bench tops and clean up.
OF THE MOULD
When resin mold casting make certain the latex mould is absolutely dry.
Polyurethanes of all types
will foam up in the presence of water. They also will stick to most
substances if a mould release is not used. The simplest release agent
to use is petroleum jelly (Vaseline) . Turn the mould inside out and
rub the jelly all over the interior of the mould in a thin film. Wipe
any excess off with a paper towel. Be careful not to miss any areas.
The latex mould for the resin mold casting can be supported by cutting
a hole in a cardboard carton (as
Use two different measures to measure an equal quantity of Part A resin
and Part B hardener and pour into two disposable paper cups. If you are
resin mold casting on a regular basis it is a
good idea to keep the measures marked PartA and PartB and set them
aside for this measuring use only.
When you are ready pour Part A and Part B into a third clean and dry
mixing cup. Stir slowly but thoroughly, for 30 seconds, with a flat
wooden stirrer and then pour into the mould. Flex the mould gently with
one hand as you pour, to ensure that the resin gets into all corners of
Tap gently against the mould to bring any air to the surface. As both
Part A Part B are the viscosity of water the bubbles will disappear
It is obvious you must work quickly with the mixing and filling of the
mould as you only have 3 minutes. We work with a clock to ensure that
during the last minute the mould is left stationary to finally set hard.
You will notice the contents of the mould gradually change from a more
or less colourless mixture to have specks of white and then suddenly it
is totally white and very hard. It is a fascinating process to watch
and for first time users quite startling.
It is usually safe to demould the casting after about 10 to 15 minutes.
Soap the outside of the mould with warm soapy water or dish washing
liquid and gradually start peeling the latex mould away from the base.
Gradually strip from the rest of the casting. Don't be rough at this
stage or you may damage the casting. When removed the casting will feel
tacky for a while, but this will disappear.
Keep out of the reach of children. In case of ingestion do not induce
vomiting. Give 1 to 2 glasses of milk or water to drink. See a
doctor.Use with rubber gloves. In case of skin contact wipe off with
methylated spirits and then wash with soap and water. Wear eye
protection. In case of eye contact, flush with water for at least 15
minutes and see a doctor. Wash thoroughly after using. Always read and
follow use and safety recommendations.
Enterprises Pty Ltd 2008