Black Glassline Pen

Black is the most used colour in my collection of Glassline pens. I use it to personalise my glasswork with names and phrases etc to meet bespoke orders. Once dried to grey I can scrape out areas or clean up outlines using a cocktail stick (and a lot of patience!). Over time you may find the bottle clogs up or the glassline is too thick. Firstly try standing the bottle in warm water for a few minutes then shake. But if that still doesn't work just add a few drops of water into the bottle, give the Glassline a very good shake and it will revitalise the product without fading the black after kilning. Not too much water though!