A loupe is bonded to a glasses-type holder to be worn around a head of a user. The loupe includes: a tube framework inserted into a hole or a cutout formed in the glasses-type holder and bonded with a UV adhesive; and a lens held in the tube framework. At least a portion at which the UV adhesive is applied in the tube framework is made of a resin not resistant to acetone and is covered with a paint resistant to acetone.

An antistatic composition contains an ambient-temperature molten lithium salt dihydrate, and one of a polymerizable compound, a plastic resin, an elastomer and an adhesive resin in which the lithium salt dihydrate is dispersed. The lithium salt dihydrate contains two types of lithium salts with different molecular weights from each other. The two types of the lithium salts are selected from a group of lithium salts each containing an anion having a fluoro group and a sulfonyl group.

An antistatic composition contains an ambient-temperature molten lithium salt dihydrate, and one of a polymerizable compound, a plastic resin, an elastomer and an adhesive resin in which the lithium salt dihydrate is dispersed. The lithium salt dihydrate contains two types of lithium salts with different molecular weights from each other. The two types of the lithium salts are selected from a group of lithium salts each containing an anion having a fluoro group and a sulfonyl group.

An antistatic composition contains an ambient-temperature molten lithium salt dihydrate, and one of a polymerizable compound, a plastic resin, an elastomer and an adhesive resin in which the lithium salt dihydrate is dispersed. The lithium salt dihydrate contains two types of lithium salts with different molecular weights from each other. The two types of the lithium salts are selected from a group of lithium salts each containing an anion having a fluoro group and a sulfonyl group.

A high viscosity primer and a process for preparing a polymer surface for solvent cement bonding are disclosed. The high viscosity primer has at least one solvent capable of at least partially dissolving or softening the surface and comprising a thickener ethylcellulose, PVC resin, polyvinylpyrrolidone (PVP) resin, acrylic resin, acrylonitrile butadiene styrene (ABS), pentaerythritol ethoxylate, or a combination thereof and present at a concentration in a range of from about 0.5 wt % to about 10 wt %, relative to the total weight of the primer. The high viscosity primer has a viscosity in a range of from about 10 to about 100 centipoise.