glass – Dave's Blog

First Glass Show

July 8, 2018May 8, 2021 Dave WagenknechtLeave a comment

For July’s First Friday, I had my first glass showing. It was part of student show at the Banana Factory in Bethlehem, PA. Some details of it’s creation are in another post.

The grouping on the light table is the main piece. I also showed some individual bowls., including two that were created with home-made coloring.

It was a fantastic experience. The works were created in a class meant to create work for display. My fellow students Lee and April also created great work.

Lee Riley

April Vergara

The Color of Light – Evolved

July 5, 2018May 8, 2021 Dave Wagenknecht1 Comment

Background

The Color of Light – Evolved is a project meant for initial display at the Banana Factory in Bethlehem, Pennsylvania. It will be shown starting July 6th, 2018.

This work shows the evolution of design, process, and skill over the several months of its creation. The bowls are displayed on a custom mounted commercially available LED lighting panel.

Design

The original intent of this project was to have overlapping bowls to create a filter effect to show the combination of colors when lit from below.

Side view of concept

Top view of color mixing – concept

By color theory, the colors would combine to produce the secondary colors. Blue plus green should create cyan, green plus red should create yellow, and red plus blue should create magenta. And all three should combine to produce white. (The software used to render this, misrenders this as an off grey. In retrospect, this should have been seen as an omen.) Note that these the colors are referenced to the framework of light not pigments.

Colored light mixing – (By en:User:Bb3cxv [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)%5D, via Wikimedia Commons)

In practice, the colors did not combine as expected. During a recent summer intensive class, I’ve had the good fortune to consult with the Dr. Jane Cook, the Chief Scientist at the Corning Museum of Glass. She advised that the this should, of course, work. Her advice was to do more experimentation with various shades of the colors at various densities. This will be a future iteration of this project.

The final project creates the feeling of of the combined colors by featuring bowls in variants of the primary and secondary colors. It also shows the evolution and occasional devolution of techniques and tools used to create the bowls.

Process

The bowls in this project are based on a technique learned from Mark Matthews in his “Graphic and Color Systems in Glass” class. The bowls are made from several gathers of glass on a solid punty. Color is applied to the end and pressed into the gather with a stainless steel poker. After the color is applied, the gather is opened with a steam stick inserted into the channel where the color was pressed in. It is then expanded into the final form by the centrifugal force of spinning the punty in the reheating furnace and working with jacks. It is cracked off then annealed.

A completed bowl on the punty

The stainless steel poker to apply the color and the steam stick were custom made for the purpose. The steam stick, like shaping blocks, is made of water-soaked cherry wood.

Color Poker and Steam Stick

Color Application (lower) and Poking (upper) Visualization

Creation

Portions of this project were created at the Banana Factory, The Studio at the Corning Museum of Glass, and my home in York, Pennsylvania.

Thanks

The following have inspired, influenced, or assisted with the project in some way. I’m grateful that they have shared their knowledge and skill.

Mark Matthews

Chad Balster

Mary Cash

Jane Cook

Dennis Gardner

April Vergara

Anna Riley

Tim Spurchise

Contact

Website: https://www.davewagenknecht.com

Email: dave@davewagenknecht.com

First Casting

June 22, 2018May 8, 2021 Dave WagenknechtLeave a comment

In the class I recent took, I was able to ladle cast glass for the first time.

Gathering from the furnace

Pouring the glass on a graphite plate

Following the the theme of the class, the glass was cast on to a piece of copper sheet metal. It nicely shows pure copper and copper red color. The red is the result of copper ions in the glass.

Ribbon Machine Molds

June 3, 2018May 8, 2021 Dave WagenknechtLeave a comment

This will add some detail to the posting of the YouTube video about the ribbon machine. I’ve found these molds that were used to form items ribbon machine. The machine was used to make a variety of items: light bulbs, tubes, and Christmas decorations among them.

These are pretty standard light bulbs. On the left is a larger bulb like a 3-way or higher wattage lamp. The center is the most typical A-19 bulb. On the right is a Christmas or indicator lamp.

The molds shown open. As the machine ran, a glob of glass would be dropped into open molds. They would be close and the glass inflated to from the bulb. Once formed they would open and the finished object would be removed.

Glass Ribbon Machine

June 1, 2018May 8, 2021 Dave Wagenknecht1 Comment

My father spent a large potion of his career in the lighting industry. This was, of course, old school incandescent lamps. He was more focused on the metal parts, especially bases, of the lamps. But he worked closely with the people who would have run these machines.

The Corning Museum of Glass has more detail about these machines on their blog. They are currently storing the machine.