Phew! Sweating away here in the studio. It is so hot today that everything is working double quick. The glue I am using to seal the chalk is drying in minutes, rather than hours; and I am experiencing the power of chalk to absorb, usually water (to form a chalk aquifer, something that adds to the characteristic clear steady flow found in chalk streams) but in this instance layer upon layer of ‘size’ (the name for the type of glue I am using). I could seal with something else, such as PVA, but I want to minimise the different materials used and as size is what I will be using to finally stick the gold leaf onto the chalk then I would prefer to use that for sealing too. A bit of a technical blog today, but then some days are like that.