Topic: Another Schmetterling question for Pamela

[Glen]

I think you have "hit the nail on the head", Christine - I think you are correct.

Looking in particular at my vaseline ''Fische'' bowl, I can understand how it appears to be slightly patchy in places. The exterior is matted (acid treated) and the interior is shiny - this provides visual depth and contrast to the moulded fish design. However, it also gives the impression (in one or two very small streaks / patches) where the exterior matt finish is absent, that the colour is slightly different.

Of course - this is vaseline green glass - so it cannot be an applied colour. Uranium as a colorant must be added to the glass batch. The glass is self-coloured, so any effect on the surface that suggests the colour is applied / superficial, is a visual trick.

That's how it seems to me, on studying my examples, for my glass. I just can't be sure for Pamela's pieces, as of course, it is necessary to handle these items and actually see them.

Glen

[Lustrousstone]

I also meant to add that I knew my uranium Walther glass is solid colour but that I could see how it might appear not to be.

[Glen]

I also meant to add that I knew my uranium Walther glass is solid colour but that I could see how it might appear not to be.

I knew you meant that (it's your "thing"  :lol: )

I didn't mean to imply you didn't mean it (convoluted statement on my behalf) but I just wrote it for clarity. (Clarity? After that sentence I don't think I can claim clarity. Blame the heat  :lol: ).

Glen

[Lustrousstone]

I was trying to clarify as well. I think :shock:

[Glen]

I was trying to clarify as well. I think :shock:

You did. And made a much better job of it than I did.  :lol:

Glen

[Anne]

Moving to Glass for updating at Frank's request.

[Frank]

Bumped into this thread quite unexpectedly on one of hunting missions... weird that I did not think about it at the time I posted before... as my light bulb studies are always in parallel with glass. From circa 1910 coatings were being applied to lightbulbs for a variety of reasons, technical and decorative. These included enamels and 'stains' but for the most part there was a continual development to find coatings that remained stable under duress of heat and light as well as physical strength. Cold to heat fused and in this area we probably find the earlier developments that lead to stable (or at least reasonably so) coatings on glassware.

Meanwhile Inkjet printing using UV inks has matured, not sure if anyone prints an entire container.... of course they can also now print containers with OLED which has the benefit(??) of allowing moving images on the containers. How will collectors of the future cope with the need to power their glass? The old plastic coatings seems so minor by comparison.

Totally as an aside you can also get edible inkjet inks that can put photos etcetera on cakes and biscuits :t: