Topic: Dating Whitefriars / Powell

[David E]

Never a problem with me, Pip!

[Pip]

  Thanks David.

[David Hier]

Now I'm pretty much back where I started: Pattern No. 9030 (in ruby), designed 1935 and manufactured between 1940 and 1964.

Which is what I said way back at the beginning of the thread in the link to my vase - just wondering now if I have a credibility problem 

Not at all, your comments were very helpful.

I'm a bit of a stickler for accuracy, so I do prefer it if I can see the original information (pattern book illustrations) for myself - or at least have a reference to work from.

[glastitute]

Of course its possible to case soda glass in crystal!!!!

[chriscooper]

Hi, and welcome 

This is an old thread maybe opinions have changed there are a few Glass Professionals around
Frank would love to hear if your opinion has changed over the years after your emphatic 'impossible'


Chris

[Frank]

Be interested in glastitute's reasoning.

Certainly in the past you will never find soda-lime glass cased in lead crystal.

Today it is feasible as you can at least get matching coe of each type, however the viscosity of the glass still creates a problem. I would still think it unlikely that anyone has done it but would be interested to know if it has. Certainly some lampworkers decorate lead with soda but that is quite different from casing. Most lampworgers today tend to use boro-silicate which would also be a problem to fuse to other types. It would also seem an expensive thing to do as the lead batch would become contaminated. Lead fused to soda can appear visually OK but if viewed in polarised light the stresses that are created would show and this would create an unstable casing for a vessel. For artistic purposes these technical issues could be ignored.

Glass fusers are generally careful to ensure matching coe's but that is again different to casing. See http://ohgreg.hubpages.com/hub/Glass-Fusing-Basics---Is-All-Glass-Fusible

[glastitute]

Well I've done it and it happens more or less everyday at Broadfield house,Alistair Malcolms furnace is stocked with dartington,and I've threaded soad over whitefriars flc pieces,so yes the coe is more or less the same,its certainly compatible as I've done it on more than one occassion.

[Frank]

But have you cased as opposed to applying?

[glastitute]

If you'd like me too I will,if it wasn't compatible the threading would have pushed away and not adhered,also Lesley Jackson states that cased ruby was soda cased in crystal,as I said earlier,Alistair Malcom cases crystal over soda nearly everyday at Broadfield,for you to say impossible is clearly wrong.

[Frank]

Had modified the impossible above. Next question would be why does Alastair do it?