>I am sure I have white (buffy colour mix of
>crystal and dark grains) silica sand that was
>given to me with other glaze ingredients.
>What happens when silica sand is used as apposed
>to the sand you buy and a plaster/cement shop? Silica speeds up the setting of lime hence giving less time to paint, also it is somewhat too "slick" for lime to adhere properly which results in weaker plaster and detachments.