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Tack Rag:
A piece of loosely woven cloth dipped into a varnish oil and wrung out. When it becomes tacky or sticky, it is used to wipe a surface to remove small particles of dust.
Tackcoat:
A thin mist-like initial coat still soft enough to accept remainder of the coat as part of the same coat application and done in order to avoid sags and runs.
Tannin:
A water soluble, natural stain in woods, such as cedar and redwood, which is usually composed of various phenol compounds.
Tannin Bleed:
A water or solvent soluble extractive in a wood substrate that will migrate through a porous paint film and deposit a yellow to reddish brown stain on the surface.
Tannin Blocking:
The process of making tannin stains insoluble by means of a chemically active or moisture impermeable primer so they cannot bleed through to the topcoat.
Tape Test:
An adhesion test using a series of intersecting cuts or an X cut through the surface of a coating or coating system that extends to the substrate. A special pressure sensitive, one inch wide tape with an adhesive bonding strength is applied to the cut surface, then pulled back smoothly at an angle of 180 degrees. The cut area of the film is then examined and rated relative to the coating remaining.
Telegraphing:
Physical marks or textures on a substrate that show through an applied film.
Test Patch:
A small representative area to which a coating is applied in order to test its compatibility, appearance or adhesion properties. When choosing a coating for a substrate or situation in which there is some element of uncertainty, a test patch can provide helpful information required to ensure a correct decision.
Theoretical Coverage:
The coverage of paint calculated from volume solids and recommended dry film thickness. The theoretical calculation does not consider losses due to overspray, spillage or other losses.
Thinner:
A compatible, volatile liquid used to modify the solids content, drying speed, consistency or other properties of a paint, varnish or lacquer. Also used for cleanup of oil or alkyd paints and application tools. See Solvents.
Tint:
A color produced by mixing white pigment or paint in predominating amount with a non-white colored pigment or paint. The tint of the color, therefore, is much lighter and much less saturated than the color itself.
Tipping Off:
Brushing technique involving the use of the tips of the bristles to smooth the applied finish.
Toner:
Pigmented lacquer sealer that is applied by spray. Toners provide color and make the surface appear more even.
Tongue & Groove (Tongue-in-Groove):
A joint formed by lumber machined to have a groove on one side and a protruding tongue on the other side so that pieces fit snugly together, with the tongue of one fitting into the corresponding groove of the other.
Touch-Up:
The ability of a coating film to be spot repaired (usually within a few months of initial painting) without showing color or gloss differences.
Transparent:
Having the property of allowing light to permeate without diffusion or scattering; clear.
Trim:
Finishing components used in construction, such as moldings, char rails, base boards, etc.
Trisodium Phosphate (TSP):
A strong alkaline chemical used for cleaning, degreasing and dulling surfaces prior to painting.
TSP:
See Trisodium Phosphate.
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