An assortment of different preservative formulations has been used in ophthalmic medicines and many of these preservatives have been linked to unwanted ocular surface side effects. Benzalkonium ...
Keep in mind that hardwood will be more durable, but softwood is certainly strong enough for this project. However, if the chair will be outdoors most of the time, coat it with a paintable wood ...
Polyquad ® is a detergent-type preservative derived from BAK. Polyquad was formulated in the mid 1980s by Alcon as a preservative for contact lens storage solutions. It was developed because ...