Topic: Crizzled Green Wine Glasses

[NevB]

These are the first pieces I've found with crizzled surface. It depends on the angle of viewing whether it's visible and held up to the light it disappears. Both have ground pontils, one larger, and I think they are probably mid 19thC. possibly by Richardson.

[Paul S.]

very nice  -  take your word for it re the age         Is this crizzling in the Ravenscroft sense  i.e. loss of transparency, or does the glass weep   ................  surprising that a maker such as Richardson should make an unstable batch, but suppose it can happen to anyone.      Do you think this might be a case that these weren't annealed in the lehr correctly?

[Lustrousstone]

Those are definitely in the early stages of crizzling. I have one or two. I've always felt that lovely shade could be Percival Vickers but...
http://lustrousstone.co.uk/cpg/displayimage.php?pid=1426

[NevB]

Paul, they don't show any cloudiness or weeping just a very fine "cobweb" appearance and speckling. Apparently it's caused by an excess of alkali or lack of stabiliser, perhaps the mix only has to be a little bit out to cause it. I thought they had the look of Richardson but they could be by someone else, I've got a few others in this nice colour.

[cagney]

Crizzling. Cannot be felt on the glass. In the beginning hardly noticeable in diffused light, shows up in direct light especially at certain angle. Severe case will cloud the article no matter the light. The term "cobweb" effect is very apt. I have used the term " a fine lace-like effect ". I think I will change my terminology.

[NevB]

Thanks cagney, I can't take credit for the cobweb description, I read it online. My glasses seem to have two different problems, the cobweb crizzling which can best be seen looking from inside the glass and the speckling which, for some reason, is only on the cut surfaces.

[cagney]

  Not quite sure what speckling is in this context. I would hazard a guess and assume some sort of obscuring feature in random or haphazard manner? spattered?

I would think the cut portions may be more susceptible to other degradations brought about by the fact that it may absorb a little different than the original annealed glass around it. Just a theory. More pictures?

[NevB]

More photos of the speckles which also appear on the foot to a lesser extent.

[flying free]

That's a type of crizzling I think . A degradation of the glass.   I have seen it on quite a lot of old opaline glass as well. I avoid buying  if I see it in the photos.

m

[NevB]

I don't mind it m, it's interesting and adds to the character and they weren't expensive