One of my favorite colors of Effetre glass is copper green (219). I like the minty green color when it is used alone. I think it goes particularly well with black. It also produces an interesting reaction with Effetre purple (254- also known as Evil Devitrifying Purple because it tends to lose its glassy sheen and become matte if mishandled), which Lynn Short reported on at a recent meeting of Southern Flames. The effect is shown in the beads below:
The color of the copper green glass in proximity to the EDP intensifies to a bright turquoise. When copper green stringer is applied to an EDP base, there is a line of intense turquoise surrounded by lighter green Upper middle). The bottom two beads show the effect of EDP stringers on a base bead of copper green. The downside of using this effect is the possibility of EDP devitrifying and producing a white scum, which it does quite easily. As suggested on the forum Wetcanvas, right before you finish the bead, put it in the hottest part of the flame until the purple turns glassy. Then take it out and don't put it back into the flame.