In reply 43 I showed a photograph comparing the abraded frosting of the decanter that was the original subject of this topic, with a modern Jon Art acid frosted item. The photograph is reproduced below.
I’ve now got a new toy so that I can have a closer look at surfaces. It’s a microscope that is nothing at all fancy or expensive (it’s a bit plasticky) and not designed for photography, so the results aren’t perfect, but not too bad either. The pictures were also clearer before shrinking for the forum.
The Jon Art acid frosting is shown first, at x100 and x175 magnification. The abrasive frosted decanter is shown below that at the same magnifications. The x100 images show an area approximately 1.35mm across and the x175 images show an area approximately 0.75mm across. For reference, the pin in the original photograph is 0.65mm diameter.
I got rid of the original Jon Art piece so the new photograph is a different Jon Art signed piece but frosted in the same way. You can see the quite uniform pits of the acid frosting and also the rougher less even chipped surface that has been abraded.
I have other similar photographs comparing a Richardson abrasion frosted goblet with Northwood white acid frosting. Interestingly, the Northwood white acid finish looks much like the Jon Art frosting, but about twice as fine. I will include those photographs on the topic for the goblet here:
https://www.glassmessages.com/index.php/topic,70755.msg402733.html#msg402733
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