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Plaster Molds


Hollyfaucheux

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Could be your water in your slip-maybe the slip recipe ingredients -do you make your own slip??What temp are you firing this slip to?

Molds can color over time-they can start out bright with and end up no so much

How old are they and how many pours do you have on them

More info is needed for a better answer.

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I use premixed slip that I buy locally and they are older molds, however, have not been poured in over 20 years. I just started using they again about 3 months ago and I am pouring once a day for 2 days, then letting the mold sit for a day. I did have to change the brand of slip I was using about 2 month ago I have just started noticing this over the last month or so. I started out using Mackies Slip and had to change to Miller because my supplier ran out of Mackies and said they would be put for a "while" I just think it's convenient that Miller happen to cost $3.00 more then Mackies!! Anyways.. any thoughts now??

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