Lustre Glazes


I hope the information and photos I am providing here will help enhance an appreciation for Imperial’s Lead Lustre art glass.

 

I spent a week or so closely examining the Lead Lustre vases in my possession. The results of this effort have left me with a greater appreciation for the creative thought and technical skill that went into the making of this line. 

 

LL yellow green finishThis is in some respects an initial effort to "peel the onion" back another layer regarding Lead Lustre; primarily to explore the lustres used and the effects of lustres on different colors of glass, thickness of lustre application on appearance, etc. I do not believe this has been done before. As a fledgling effort, I am sure I have/will make many mistakes. I'm equally sure however that over time, with the help of others and perhaps the discovery of factory records, this effort will be improved.

 

Here then are definitions and my observations, including a detailed description of each of the 23 documented Lead Lustre decors:

  • Bone white glass, lead glass, was used as the base glass in 19 of the 23 decors and in the decoration of three of the remaining four decors, i.e. opal in marbleizing or opal festoons. Hence the "lead" in Lead Lustre. The only decor without white glass is Decor #10.
  • Both lustres and/or iridescent finishes can be found somewhere on all 23 decors - hence the "lustre" in Lead Lustre.
  • Lustre a uniform, shiny finish on the surface of transparent or opaque glass. 
  • Lustre may be clear, colored, glossy or even have a satin finish,e.g. I have identified two satin lustres used on certain Lead Lustre decors, clear satin and pale blue satin. 
  • Lustres sometimes do not have a metallic shine but instead resemble the shimmer seen on a soap bubble. 
  • Iridescent Lustres - Hot or reheated glass is sprayed with a liquid solution of metallic salts (different salts produce different colors). The liquid burns off leaving a fine metallic film on the surface of the glass The iridescent spray was called "dope". On Lead Lustre pieces, this iridescence is most often orange and found on the interior throats of pieces.
 
Here are close-ups of some documented & undocumented Lead Lustre examples. The lustre names I'm using are not documented.
 
NOTE: Imperial's stretch glass had many names, often based on the brilliance, color and overall effect that doping and reheating imparted to the glass. These names included Rubigold, Azur, Helios, Nuruby, Saphire, Peacock, Purple Glaze and satin colors such as Rose Ice, Blue Ice, Amber Ice, Green Ice, Iris Ice and others, Colors in all Carnival Glass, including Imperial's, are determined by the color of the glass, not the iridescence.