Fusing Sheet Glass on Bottle Bottom Molds

Originally designed specifically for fusing the bottom of bottles, my bottle bottom molds can also be used with sheet glass. This quick switch will expand the usefulness of your molds, as well as give you new options and projects. Let’s get started!

Fusing with Window glass

Materials needed:

Bottle Bottom Mold – in this tutorial, the Celtic Knot mold is used

1/8″ (3mm) window glass or 1/4″ (6mm) window glass

Kiln wash or Zyp

  1. Cut circles of glass. The Celtic Knot mold is exactly 4″ wide, so we will cut our circles smaller, to center the design. It is very important that the overall thickness of the glass is AT LEAST 1/4″ (6mm) it can be thicker, but not thinner.

2. Place window glass on prepared mold (tin sides in) and fire to a full fuse:

This project can now be finished as desired. Things to think about:

  1. Add hanging loops during the fusing process. This will eliminate the need to drill holes. You can also add more than one loop to easily make chimes.
  2. Use sheets of unrolled bottle glass to make the same design, but in a color. Again, no drilling if you add loops.

Trouble shooting – sometimes things are not as awesome as you’d like, so here are some things to watch out for.

Not enough glass – using less than 1/4″ (6mm) glass can result in little or no detail in the design. This can be resolved by using the correct thickness of glass. If you are still experiencing a lack of detail, you may need to adjust your firing schedule to a higher temperature. (all kilns fire differently)

Fusing with Window/Bottle Sheet Glass on Bottle Bottom Molds

SegmentRampTempHold
1350 F1275 F20 min
2350 F1550 F8
399991060 F60
4150750off
Please note all firing schedules are prepared the the best extent of my knowledge and that all kilns fire differently. Please use common sense and knowledge of your own kilns processes to adjust the firing schedule appropriately. This schedule is a starting point only, and in no way guaranteed. If you need help adjusting your firing schedule, please contact me.

Fusing with System 96 glass

Even if you are not a recycled glass enthusiast, my molds can bring a new zing to your glass practice. Let’s have a look

Materials needed:

Acorn & Oak Leaves Mold (kilnwashed or Zyp coated)

Light Amber Streaky

Dark amber transparent

Dark Green transparent coarse frit

22 g Nichrome wire loop

  1. Place the dark amber over the mold and trace the shapes of the acorns with a marker. Cut out and place in mold.

2. Add the green frit to the leaf cavities

add green frit

3. Cut two 3″ circles from the light amber streaky, place one streaky side down on the mold. Add the nichrome hanging loop and add the other circle amber side up. Full Fuse using schedule for System 96 on Bottle Bottom molds. Consider adding multiple loops to increase your design options.

Schedule for System 96 glass – full fuse on bottle bottom molds

segmentRamp RateTemperatureHold
1350 F125020
2350 F14508
3999995060
4150 F700off
Please note all firing schedules are prepared the the best extent of my knowledge and that all kilns fire differently. Please use common sense and knowledge of your own kilns processes to adjust the firing schedule appropriately. This schedule is a starting point only, and in no way guaranteed. If you need help with your firing schedule, please contact me.

Fusing with Bullseye glass (90) on Bottle Bottom Molds

Here’s a quick tutorial using Bullseye glass on a bottle bottom mold as well. Let’s get started!

Materials needed:

Butterflyfish Mold (kilnwashed or Zyp coated)

Bullseye Deep Royal Blue Transparent Double Rolled Fusible 3mm

22 g Nichrome Wire Loop

1. Cut 3″ circles

2. Add hanging loop, fire to full fuse using the Bullseye 90 Fusing Schedule for Bottle Bottoms

Fusing schedule for Bullseye (90) glass on Bottle Bottom Molds

SegmentRamp RateTemperatureHold time
1350 F1250 F15
2350 F1475 F8
39999900 F60
4150 F700 Foff
Please note all firing schedules are prepared the the best extent of my knowledge and that all kilns fire differently. Please use common sense and knowledge of your own kilns processes to adjust the firing schedule appropriately. This schedule is a starting point only, and in no way guaranteed. If you need help with adjusting your firing schedule, please contact me.

Related Articles:

Fusing with Bottle Bottom Molds

Related Products:

Bottle Bottom Molds

Nichrome Wire