1 Select the country, the photo type and the print size, and then upload a photo. 2  Once the photo is uploaded, the Crop page opens. 3  On the Crop page, you can cut the image using the crop frame. 4  If face detection is successful, the crop frame is adjusted to the detected face. Once the photo is uploaded, the Crop page opens. 2  On the Crop page, you can cut the image using the crop frame. 3  If face detection is successful, the crop frame is adjusted to the detected face. 4  When you have set the cropping, click on the Make Photo button. 5  Download the printable image from the Download page.
The materials used in the production of plastics are natural products such as cellulose, coal, natural gas, salt and, of course, crude oil. Crude oil is a complex mixture of thousands of compounds. To become useful, it must be processed.
Nylon is made of repeating units linked by peptide bonds. Commercially, nylon polymer is made by reacting monomers which are either lactams, acid/amines or stoichiometric mixtures of diamines (-NH2) and diacids (-COOH). Mixtures of these can be polymerized together to make copolymers.