Fujifilm Fujichrome Velvia 100 Color Slide Film ISO 100, 35mm, 36 Exposures At ISO 100, Fujichrome Velvia 100 provides a more useful speed for greater flexibility in varied shooting situations. PSHC (Pure, Stable & High-Performance Dye-Forming Coupler) technologies Based upon the highly regarded ultra-fine grain emulsion technology of Provia 100F, the new Fujichrome Velvia 100 grain structure has been further improved even while maintaining ultra-high color saturation. MSSC (Multi-Structured Sigma Crystal) technology CEL (Color Extension Layer) technology