Temperature Conversion
To Convert °F
to °C: (°F - 32) x 0.56 = °C
To Convert °C
to °F: (°C x 1.8) + 32 = °F
° F ° C Cone ° F ° C Cone
100 38 1706 930 09
200 94 1733 945
08
300 150 1787 975 07
400 206 1841 1005 06
500 262 1886 1030 05
600 318 1922 1050 04
700 374 1976 1080 03
800 430 2003 1095
02
900 486 2030 1110 01
1085 585
022 2057 1125 1
1103 595
021 2075 1135 2
1157 625
020 2093 1145 3
1166 630
019 2129 1165 4
1238 670
018 2156 1180 5
1328 720
017 2174 1190 6
1355 735
016 2210 1210 7
1418 770
015 2237 1225 8
1463 795
014 2282 1250 9
1517 825
013 2300 1260 10
1544 840
012 2345 1285 11
1607 875
011 2390 1310 12
1634 890
010
Moretti
/ Effetre = 968 °F
(C.O.E. = 104)
Bullseye
Glass = 990 °F (transparent)
(C.O.E. = 90) = 935 °F (opals)
= 882 °F (gold-pink transparent)
Pyrex
Glass = 1050 °F
(C.O.E. = 32)
Bead
Annealing
Anneal for 30 minutes for
each ½” thickness.
Example: ¼” bead thickness =
15 min. anneal time
½” bead thickness = 30 min. anneal time
1" bead thickness = 1 hour anneal time
… and so forth
Please note: the measurement
above is thickness, NOT length.
Note: Fused & slumped glass should be annealed for 30 minutes for
each ½” thickness up to 1”, then at least 1 hour for each add’l ½” thickness over 1” thickness. Example: A
fused paperweight that is 2” thick should be annealed for 3 hours. Remember,
the annealing time is for thickness and not length.
If you have difficulty determining the annealing time,
you can always play it safe and anneal for longer time periods. You CANNOT
over-anneal.
Centre
DeVerre
April 26, 2005