A pint of that red stuff

One of the problems with etching aluminium in copper sulfate is the buildup of Red Stuff (technical name unknown) that occurs in the etched lines. Feathering doesn't always relieve this. I've gone so far as to scrub the plate with one of those rough sponges you use when washing cookware in an attempt to remove it. This is not recommended because it may scratch the plate and doesn't totally work anyway. Definitely don't do it with the ground still on, because it will scratch your ground. The Red Stuff must be removed because it stops the ink from going into the lines and you end up with the Most Horrible Broken Lines Ever.

Here's a picture of the Red Stuff on the plate and a picture of the resulting proof, to show you how troublesome the Red Stuff can be.





Sometimes the only way to remove the Red Stuff is to go over the lines lightly with your etching needle to dig them out. This is a pain in the ass to do so if you've found alternative methods, let me know.

This is what the plate looks like after the Red stuff has been removed.



And the resulting print, lines intact. (Ignore the colour. I can't find a proof which I haven't already painted)



And to promote myself, here is what the actual artwork looks like as a whole. It is part of my Bahay Kubo series, which you may view on Etsy. Bataw is Hyacinth bean in English, and Lablab purpureus in Science :)



I won't be using aluminium for a while because I've just bought a nice big pile of copper plates (from Neil Wallace Printmaking Supplies, Melbourne) and am (temporarily?) switching to etching copper with ferric chloride. The next post will show you my semi-horrible first attempt at etching a copper plate.