
General Instructions:
Begin by treating the mold with the Boron Nitride spray in a
ventilated area. Several light coats with a short waiting period
between coats is preferable to one heavy coat. Shake the can
well before use and hold the can upright while using to assure
proper distribution of product. It is important to make sure to
turn the mold at various angles to make sure to coat the mold
wall. (For more information on the use of this product
http://mr-97.com/info/).
Before adding frit to the mold, place the mold on a scale and weigh it. (Fig. 1) (Tip: you can use an
underglaze pencil to write the weight of the empty mold on the outside of the mold and the number
will be there after ring for future projects.) The green buttery featured in this tutorial was made
using a total of 3 oz of frit. This frit was taken to a full fuse using the ring schedule provided. It is
possible to make lighter butteries by using less frit and a lower working temp in the ring schedule.
Weights and working temps in segment 4 are given for the various weight options. Fine and powder frit
should be used exclusively for the 1.5 oz butteries as medium grain frit will remain textured at low
working temps. To create precise frit placement, a Powder Vibe (or other similiar tool) can be used with
powdered frit. The precise frit placement should be done rst.
The Green Buttery Colors and Process
Use a Powder Vibe to place powdered transparent Cobalt in the dots on the perimeter of the
wings, the edgs of the wings and in the low area of the body. (Fig. 2)
Fill the body with ne Chestnut Opal frit and use a frit sifter to sift powdered Deep Aqua frit
along the wing edges (Fig. 3). Use a powder sifter to cover the entire buttery with a light
coat of powdered yellow opal (Fig. 4). Add ne transparent Yellow to the area just outside of
the body on the wings and ne transparent Moss to the to the outside edge of the wings. Place
ne transparent Dark Amber frit over the moss frit in the lower section of the wings, top tip
of the wings and onto the body allowing some of the Dark Amber to spill into the transparent
Yellow next to the body. (Fig. 5)
Place the mold onto the scale and add 1.5 oz of medium grain Pastel Green all over the mold
cavity. (Fig. 6) Add medium Clear until the mold weighs 3 oz more than it did before it held
any frit. Sweep the clear frit back from the mold wall to help prevent burrs. (Fig. 7)
Cut two 5” pieces of 18 gauge bare copper wire and bend 1/4” of the end of each wire at a
right angle. Place the tip of the bent ends into the frit at the top of the butteries head. (Fig. 8)
Fire the project using the ring schedule provided chosing the 3 oz working temp in segment
4.
The red butteries can be used in a variety of
delightful ways. An alligator clip can be glued to
the back of the buttery and the buttery can be
clipped into arrangments and onto copper tubes/
wires. Additionally the thinner butteries can be
lightly tack red (1300 degrees) to other glass
projects.
Frit Cast Buttery
Tutorial
Fig. 3
Table 2 - Fuse ring schedule for butteries
Segment rate temp hold
1 275 1000 10
2 275 1225 30
3 275 1300 10
4 275 1470 - 3 oz
1440 - 2 oz
1400 -1.5 oz
5
5 9999 960 60
6 100 800 1
This guide demonstrates how to use various grains of trans-
lucent and opaque frit in a mold to create the green butteries
pictured. The artist can also choose to use any assortment of frit
colors and combinations.
The following materials were used to create the butteries
as photographed:
• CPI molds: LF107 Frit Cast Buttery
• MR-97 Boron Nitride Spray
• 18 gauge bare copper wire, powder sifter, powder vibe
• digital kiln with chamber 8” dia. or bigger
• System 96 frits: F1 (powder) Deep Aqua, Yellow Opal, Co-
balt, F2 (ne) Yellow Trans, Med. Amber, Dark Amber, Moss
Green, Chestnut Opal F3 (Medium) Pastel Green, Clear.
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7 Fig. 8