3D printers use digital models to fabricate three-dimensional objects, a layer at a time. The process of 3D printing - called additive manufacturing or rapid prototyping in engineering and commercial settings - has been around for almost 30 years. Low cost 3D printers, do-it-yourself kits and open source software are bringing the technology into broader use.
3D Printing launched at the Valley Library on 3/31/2014. No tuition money was used to purchase the printers. 3D Printers at the Valley Library are open to all OSU student, faculty, and staff.
All other plastics not included in the other categories and mixes of plastics 1 through 6 are labeled with a 7, including compact discs, computer cases, BPA-containing produces, and some baby bottles.
PLA (polymer polylactide) is a plastic made from plants (usually corn or sugarcane) this is also labeled with a 7. PLA plastics don’t contain BPA; no safety concerns have been raised about using PLA plastic with food. Right now, it can be difficult to tell the difference between a PLA no. 7 plastic and a BPA-containing no.7 plastic. Some PLA plastics may also say “PLA” near the recycling symbol. Others may have a leave symbol near the recycling symbol.
To clear up any confusion, the manufacturers of PLA plastic are working with the American Society for Testing and Materials International, a global group that develops standards, to create a new recycling numbering system that would give PLA plastic its own number.
Do NOT cook food in no. 7 plastics that aren’t PLA and avoid using non-PLA no. 7 plastics around any type of food.
Source: http://www.breastcancer.org/risk/factors/plastic, accessed 04/10/2014
Here are some interesting links about PLA and other plastics below: