Then you pour the mix into the molds.
Wait about 5 minutes, then use a paper tower to draw off some of the pooling water. This is followed by scraping the mold. There is always some excess, and I do my best to recover as much of it as possible. Usually this means extra floor tiles.
|Picture from hirstarts.com|
Then you wait some more for the brick to dry. Since I’m doing my casting at night before bed, these bricks won't be ready till the next day. However I took pictures of the previous day’s bricks.
With the plaster I’m using (Excalibur dental plaster - way stronger than plaster-of-paris) you can generally de-mold the bricks after about 30 minutes.
Once the bricks are demolded, you need them to dry completely before you use them. I’ve got a dehumidifier running in the basement, and I lay them out on newspaper, so they tend to dry quickly. A day or two in dry conditions tends to be enough.
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