| Sagging |
Sagging
Usually occurs on vertical surfaces where paint has been too thickly and unevenly applied resulting in "horizontal runs" with a thick lower edge.
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| Sand Blasting |
Sand Blasting
Grit and sand blasting are processes used in the preparation and cleaning of steel to remove millscale and corrosion products, Both processes are highly specialised.
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| Sanding |
Sanding
The use of an abrasive to level a surface prior to painting. The more common term used by painters is "rubbing down".
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| Saponification |
Saponification
The effect of alkali on oil based paints in the presence of moisture. Mild attack causes the paint to soften and probably discolour. In severe cases the paint may be completely destroyed.
Alkali in damp cement, concrete, lime plaster, asbestos or similar materials and contact with alkaline solutions will cause saponification of oil based paints.
When saponification has occurred, the surface must be stripped, washed and allowed to dry out completely before repainting. If the paint is likely to be in contact with alkaline solutions, as in some industrial environments, non-saponifiable specialist coatings may be required.
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| Satin Finish |
Satin Finish
A finish with a low to medium degree of sheen or gloss finish.
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| Scrubbability |
Scrubbability
The ability of a paint fim to withstand scrubbing and cleaning with water, soap or other household cleaning agents without apparent degradation.
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| Scumbling |
Scumbling
A technique in painting whereby the final coat is patterned or partly removed to expose the undercoat or ground coat in order to obtain colour variety.
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| Sealer |
Sealer
A clear or pigmented coating, applied to an absorbent surface to reduce absorption or suction, or to a powdery or friable surface, after thorough preparation to reduce the risk of flaking of subsequent coats.
The term also refers to coatings whose function is to prevent discolouration or staining of subsequent coats by soluble matter, Some sealers may also function as 'primers' (q.v.)
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| Seediness |
Seediness
The appearance of very small particles in a dried paint film.
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| Selvage |
Selvage
Finished sides of the lengthwise grain that prevents raveling.
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| Semi-Gloss |
Semi-Gloss
An intermediate level of gloss between a "full gloss" and an "eggshell" finish.
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| Set |
Set
The condition of a paint coating when it has ceased to flow.
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| Settee |
Settee
A long seat or bench with a back and arms that can seat two or more people.
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| Settlement |
Settlement
On long storage, the solid constituents of paints, notably the pigment, tend to settle out.
Unless the settled material is properly is reincorporated, the opacity and other properties of the paint may be impaired. thorough mising witha broad blade stirrer, using a lifting and beating action, is effective for small quantities of paint.
For large quantities, a mechanical shaker may be more practical. When paints, known to be prone to settlement, are stored inverting the containers at regular intervals is helpful.
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| Settling |
Settling
The deposition of the solid particles of a paint to the bottom of the container.
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| Sheariness |
Sheariness
The occurrence of areas of apparent roughness or uneven sheen in a matt or mid-sheen paint finish, especially when the surface is viewed at a low or glancing angle.
When the sheariness is evident, it is often along the 'laps' of joins between adjacent sections of the work and a common cause is the failure to join up before the 'wet edge' has set. Variations in the porosity of the surface may also be responsible for sheariness.
Light flatting and a further coat, avoiding the previous fault in application, (if this was the cause), will usually remedy the defect. On large areas, roller application is often less likely to result in sheariness than using a brush.
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| Sheen |
Sheen
The degree of gloss in a low gloss or matt type finish.
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| Shiner |
Shiner
A spot that is glossier than the surrounding surface.
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| Shoji Screen |
Shoji Screen
A free standing Oriental-style sliding door with paper inserts, often used as a room divider.
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| Shop Priming |
Shop Priming
Factory application of primers to wood, metal, etc.
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