Bullseye is 90COE and isn't compatible with Effetre or Vetrofond Rods. The annealing Temperature range is 505- 520 Celsius.
Colours That Strike

Many glasses that Bullseye produces appear pale or even colourless in their cold form but “strike” or mature to a target colour when fired to the right temperature. These styles are marked with the symbol above.
Not recommended for Stain Glass or Mosaics as Kiln required to achieve colour shown.
Striker
This style may not reveal (strike to) its target colour until fired.
Cold Characteristics
Opaque, very white.
Working Notes
Torch: Avoid thermal shock by warming this style gradually.
Kiln: Lighter colour and greater opacity than in sheet glass form. Very viscous; will flow later and less than other glasses.
Other: 000137 has a lighter colour in rod (-0576) and stringer (-0007, -0072) forms than in sheet (-0030).
Reaction Note: French Vanilla may react to varying degrees with gold-bearing lead (001311, 001215, 000301, 000305) and copper (001116, 001408, 001417, 000144, 000145, 000146) glasses.