Fusing Glass Catalogue Final - Flipbook - Page 6
CELSIUS
Re-firing Thick, Previously Fired Work: 1-8-inches (25-203 mm) in Celsius
For work 1" (25 mm) thick and up, and over 24"(61 cm) in any direction, Oceanside recommends using kilns with top, side, and bottom heating
CELSIUS FIRING SCHEDULE (Ramps are for 6” or larger open face firings on shelves)
HEATING
Step 1
Target
Temps >>
Max
Thickness
149º C
Ramp
Hold
ANNEALING AND COOLING
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
538º C
To desired Peak Temp
(See Peak Temp Table)
510º C
413º C
278º C
42º C
Ramp
(Rate /Hr)
(Minutes)
(Rate /Hr)
25 mm
28º C
40
28º C
38 mm
21º C
60
51 mm
14º C
76 mm
Hold
(Minutes)
Ramp
Hold
(Rate /Hr)
(Minutes)
100
103º C
21º C
150
80
14º C
10º C
120
102 mm
6.7º C
127 mm
Ramp
Hold
Ramp
Hold
(Minutes)
(Rate /Hr)
Per Peak
Temp Table
AFAP*
220
(3.6 hrs)
14º C
0
25º C
83º C
Per Peak
Temp Table
AFAP
360
(6 hrs)
6.7º C
0
180
69º C
Per Peak
Temp Table
AFAP
480
(8 hrs)
3.9º C
10º C
225
56º C
Per Peak
Temp Table
AFAP
720
(12 hrs)
160
6.7º C
270
42º C
Per Peak
Temp Table
AFAP
5º C
200
5º C
305
38º C
Per Peak
Temp Table
152 mm
3.3º C
240
3.3º C
340
33º C
178 mm
2.5º C
280
2.5º C
375
203 mm
2º C
320
2º C
405
Note that data has been estimated
Ramp
Min Total
0
83º C
0
43
(1.8 days)
13º C
0
42º C
0
68
(2.8 days)
0
7.8º C
0
23º C
0
105
(4.4 days)
1.7º C
0
3.3º C
0
10º C
0
193
(8.1 days)
960
(16 hrs)
0.8º C
300
(5 hrs)
1.7º C
0
5º C
0
350
(14.6 days)
AFAP
1200
(20 hrs)
0.7º C
375
(6.3 hrs)
1.3º C
60
(1 hour)
4º C
0
444
(18.5 days)
Per Peak
Temp Table
AFAP
1440
(24 hrs)
0.4º C
450
(7.5 hrs)
0.8º C
150
(2.5 hrs)
2.5º C
0
666
(27.8 days)
31º C
Per Peak
Temp Table
AFAP
1680
(28 hrs)
0.3º C
525
(8.8 hrs)
0.7º C
225
(3.8 hrs)
1.9º C
0
870
(36.3 days)
28º C
Per Peak
Temp Table
AFAP
1920
(32 hrs)
0.2º C
600
(10 hrs)
0.4º C
300
(5 hrs)
1.3º C
0
1271
(52.9 days)
Ramp Rate in half
(Minutes)
Hold
(Minutes)
For drop slumps cut Step 3
(Rate /Hr)
Hold
(Rate /Hr)
for 127 mm, 152 mm, 178 mm, and 203 mm thicknesses
(Minutes)
Ramp
(Rate /Hr)
*AFAP means As Fast As
Possible
PEAK TEMPERATURE TABLE - OPEN FACE MOLDS
FIRING STEP DEFINITIONS /OBJECTIVES
Step 1
Start heat up of pre-fired cold glass, shelf, mold and kiln. Soak to distribute heat evenly.
Step 2
Heat pre-fired glass components to softening point. Hold to distribute heat evenly.
Step 3
Fire to desired peak temperature. Hold to desired finish.
Step 4
Lower to upper annealing point, dropping quickly to minimize devit. Hold to distribute the heat evenly.
Step 5
Annealing ramp: cool to below the strain point. Hold.
Step 6
First cooling Ramp. Hold.
Step 7
Second Cooling Ramp. Open kiln when kiln interior is at room temperature.
This guide is intended as a starting point. Variations of 25º F (13.9º C) or more are expected for specific needs and circumstances, such as
kiln type, rate of ramp-up, soak (hold) length, thickness of work or mold, etc. All other factors being equal, Oceanside Compatible glass will
require a peak temperature about 25º F (13.9º C) below COE 90 (Bullseye) glass.
Temp F
Activity
Bending (uni-directional)
Shallow Drop
Slumping with molds Medium drop
(sinks)
