The right torch for Bullseye rods COE 90
 

I tried to make little leaves using bullseye rods COE 90. I used a local dual-fuel torch (oxygen and propane), but the glass colors changed and the clear glass rod turned greyish. Is a single fuel torch better with soft glass ?

No. Just sounds like the flame had too much propane.

Many thanks Kathy

What torch did you use? Properly adjusted, any lampwork torch can do a good job with Bullseye.

I used my instructor's torch. It was a mini burner probably made in China. I will order Nortel mini burner and hopefully find the right oxygen concentrator for my own work.