Mould print thru help


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Jdmleesy
Jdmleesy
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Iv been doing afew moulds using the unimould system .I'm a complete newb at the mo and I'm just getting a feel for it before I jump into the infusion part.

So my first mould came out more or less perfect and that was with
Easy lease 
2coats of gel coat 
2 layers of 80g csm
3 layers of 450g csm

But the second mould of a different part had really bad print thru on the part and the mould and that was with 
Easy lease 
Release wax 
1 layer of gelcoat(as thick as I could)
2 layers 80g
2 layers 450g

I just want to know what's maybe gone wrong and if I can save the mould by sanding it flat and using high build primer or something 
Any help appreciated 
wozza
wozza
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Several possible problems.

What was the second part you took the mould from made from. Had you applied anything to the surface of the part like 2k primer?
Did the mould release from the part ok?
How long and what temperatures was each stage allowed to cure at? ie how long was the gelcoat left before the coupling coat was applied. And how long was the coupling coat left before the backing layers where applied?
How long and at what temp was the mould left to cure before demoulding?

Sorry for all the questions but it will help us to understand/explain what went wrong.Smile

If the print through isn't too bad then there may be enough gelcoat to flat and polish out the print through.

Depending on the size of the mould it may be cheaper (unless your time is free) and quicker to pull another mould.

Some pics of the part and the print through may help also.

Regards Warren

Carbon Copies Ltd
Edited 11 Years Ago by wozza
Jdmleesy
Jdmleesy
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Both parts were black plastic panels off my car although the one with the problem was a glossy finish but I don't think it was laquerd defo no primer 
Both moulds released without a problem at all and the temps were more or less the same cuz I did it in my dining room lol stuff stinks
The gelcoat was left a little longer on the second part it still had tak but very slightly same with the coupling coat on the sencond
And I left the part for a good 10/12 hours and it was all that creamy white colour 
Thanks warren il try get some pics later
GO

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