Product Details

Product Information

Glassline pens are a lining and shading material for glass and are simple in design, easy to use and can be thinned with water.

Use with the tip set for accurate drawing and writing, or simply use exactly like paints, applying with a brush.

The pens may be applied between multiple layers of glass or on the top surface for a complex dimensional look.

The pens may also be sprayed to create subtle shading variations.

Compatible with most types of glass including float, CoE90 and CoE96. Glassline pens fire to a full fuse temperature of 790ºC to 820ºC.

Glassline paints are lead free and food safe.

2oz Bottle.

Health & Safety

Warning: Do not ingest or inhale. Avoid dust formation, if dust occurs refer to Safety Data Sheet.

This versatile glass pen offers excellent consistency and opacity for detailed work on glass. Customers praised its ease of use for painting, writing, and shading. "So versatile, paint, write, shade," noted one reviewer. However, some reported the color fires as dark grey rather than true black, and bubbling can occur in microwave kilns.

Opacity (positive)Consistency (positive)Price (positive)Detail (positive)Kiln (neutral)
D
Deb
Not a true black

Very reasonable price for the quantity in the bottle, and it is super easy to apply, when used with the tip kit. But I was very disappointed with the colour, after firing on full fuse. It was a flat dark grey. I wanted to put in fine detail on my pieces and wanted it to be compatible against the black elements of glass in the piece. I'm now looking for an alternative pen type.

E
Emma C.

I found this product really easy to use. I bought several colours and have used them to produce detailed paintings.

I love the fact that the colours can be mixed together to create totally unique shades and work.

I suggest buying a tip kit if you want detailed work.

Highly recommended

B
Bettina B.

Very good consistency and opacity. Can be applied very well with the paint cannulas.

K
Kjell B.

I really enjoyed this, and it works well in my microwave kiln.

H
Helen L.

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!

J
James W.

This review is from a user of a microwave kiln. Now I know there are differences between kiln kilns and microwave kilns but I love mine and am always trying to find new things to use with it.

This one however didn't really work as well as I would have liked but in their defence, glassline pens do NOT say they will work in microwave kilns (ok they don't say they don't work either but you get my meaning lol)

What I have found is the ink bubbles up upon fusing, I have tried very long and slow fusing and it still bubbles up. Now it isn't terrible, if you write your name for example and the blackness bubbles up it is still readable and looks very effective. However, I wanted it to draw specific bold geometric shapes for customer requests and I wasn't able to fulfil this to a satisfactory conclusion.

So, 4 stars from me, because it does work and it has so much potential even in a microwave kiln lol

K
Katrina H.

I love these pens, paint, draw, shade and write they do it all well.

K
Katrina H.

So versatile, paint, write, shade.

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