Figure 6

(a,b) Geometry change ratio for different pressures and temperatures. (c,f) Preform, (d,g) cane and (e,h)Ā [36;32.4.3.4] PCF calculated with the Navier-Stokes model. The cane drawn in the first stage (g) was inserted into a sleeve that had anĀ 11Ā mm outer diameter. Cane and sleeve were drawn in the second stage to theĀ [36;32.4.3.4] PCF.