ICAP: Four Experiments

I've spent the last couple of weeks teaching myself (e.g., experimenting with) copper etching.  I have an idea for the 4 necklace, but it requires etching.  So, I've been experimenting with different resists, etching times, and ways to remove resists.

First, I started with a permanent marker that is not a Sharpie (that's the barely visible 4 in the upper left corner).  Ick.  You can barely see it.  I put it in the etching solution for just 15 minutes, and the resist was nearly gone at the end of it.

Next, I tried an enamel paint marker (that's the upper right 4) for 10 minutes.  That looked good, but the etch wasn't nearly deep enough.  Also I only covered the back with masking tape, and so the back got etched in a very inconsistent and unattractive way.

Third up (bottom left) I tried an enamel paint marker and covered the back in enamel paint.  I put it in the etching solution for an hour.  You can't see it, but the back got dorked up.

Fourth (bottom right) EUREKA!!  I used the enamel paint marker and put it in the bath for an hour.  The etch is deep and pretty.  And the back I covered with both Sharpie and masking tape; the back was untouched after I used acetone nail polish remover to take off the sharpie.  WHEEE!!!!  I think I've got it.  Now, on to the real thing.

Oh, and a couple of attempts to use alcohol inks to increase the contrast with the copper.  And maybe making a stamp out of an eraser.  And maybe a few other ideas before I start making the 4 necklace and some copper cuff bracelets for the store.