ChalkolaLiquid Chalk Pens for Blackboard, Chalkboard, Whiteboard, Window, Labels, Glass, Board - (10 Vintage Colours) Wipeable Paint Chalk Markers, Washable Ink, 6mm Reversible Bullet & Chisel Tip

These are excellent pens. I use them on chalkboard vinyl that I used to make a notice board on the wall. It was too smooth for chalk to write smoothly, but these are perfect. The colour range is lovely, and the ink gives a really good depth of colour. They write smoothly and erase cleanly with a damp cloth.

Great fun. Bought them for a uni project and then used them for sign writing on a board for the campervan. Excellent coverage and a very fine tip. Great choice of colours in the vintage/retro pack.

Worked well, write nicely the only issue is some of the darker colours do not show up well on a black board, but other than that great. There are so many colours to pick from it doesn't bother me that one or two are a little dark!

Brilliant pens - beautiful colours and much better alternative to chalk. Exactly as described.

Easy to use, great colours that show up well! The fine tip makes them so easy to write with compared to other chalk pens I’ve used.Would definitely buy again!

The pens seems fantastic! takes a minute for the ink to start seeping down the nib when first using, but once they have the quality is great.

These pens are really nice to use, the lines are sharp and clear. The only thing about such clear lines is you have to wait 20+ seconds for it to dry, so erasing mistakes can take time. This is a common trait for pens like this, to deposit so much chalk to create such sharp easy to view lines is you use a lot of liquid.Once you've drawn something it fixes really nicely, I've run my hands over the glass and had no smearing, blurring or line bleed once it's dried. Cleaning it off requires a damp cloth or a firm dry wipe. I've only used these on glass and glass like surfaces, never tried to use it on porous surfaces where it would be permanent, so I leave that to other reviewers to write about.These pens are really good to use and the company who makes them have a really good reputation for this stuff, having used their products before I've never had a problem.

Overall a nice product however some of my pens, no matter how much I shake to mix them, still come through watery with very little pigment which makes them useless on a blackboard. I also noticed that some colours (such as yellow and light green) stained my blackboard and left behind traces of previous images/notes which makes the whole purpose of the blackboard a little ruined. The colours and shades are great, I would recommend them for artists using black/dark paper, but as a chalkboard pen I can't fully recommend them.