The bright flash occurs because when sperm enters an egg it leads to a surge of calcium which triggers the release of zinc from the egg. As the zinc shoots out, it binds to small molecules which emit a fluorescence which can be picked up by camera microscopes.
Shibori is a Japanese technique of creating designs in dyed fabric. It is a dye-resist technique, using items that bind the fabric to create areas where the dye will not penetrate. Depending on the materials used and how the fabric is bound, the dyed designs vary from random splashes of color to highly symmetrical patterns.
Rather than treating cloth as a two-dimensional surface, with shibori it is given a three-dimensional form by folding, crumpling, stitching, plaiting, or plucking and twisting. Cloth shaped by these methods is secured in a number of ways, such as binding and knotting.he common English translation of the Japanese word shibori is tie-dye; however, a more accurate translation is shaped resist dyeing, which describes the inherent patterning process of manipulating the two-dimensional cloth surface into three-dimensional shapes before compressing them to dye.