Glass Packaging Institute the glass finish number. For example, an 8-425 finish is approximately 8 mm neck outside diameter with a 425 finish corresponding to a threaded neck typically found on small vials. Glass Packaging Institute The Glass Packaging Institute (GPI) is the North American trade association for the glass container industry, headquartered in Arlington, Virginia. Through GPI, glass container manufacturers advocate job preservation and industry standards, and promote sound energy, environmental, and recycling policies. The GPI membership consists of 5 glass container manufacturing member companies, and 33 supplier member companies, who provide raw materials, recycled glass, equipment, decorating, and other services to
Small cancellation theory regarding the metric small cancellation condition is the following statement (see Theorem 4.4 in Ch. V of ) which is usually called Greendlinger's lemma: Let (∗) be a group presentation as above satisfying the C'("λ") small cancellation condition where 0 ≤ "λ" ≤ 1/6. Let "w" ∈ "F"("X") be a nontrivial freely reduced word such that "w" = 1 in "G". Then there is a subword "v" of "w" and a defining relator "r" ∈ "R" such that "v" is also a subword of "r" and such that Note that the assumption "λ" ≤ 1/6 implies that (1-3"λ") ≥ 1/2,