Finger-marking

So your afternoon was not completely wasted. Nostradamus had listened with one finger marking his place in the ephemeris and his pen poised in his other hand. Now he dipped the quill in the inkwell and went back to work. Go and eat or do something useful. ... 

Figure 22. Stressed polystyrene after contamination by finger marks...

Transparent Vitreosil apparatus must be given special care, as cleanliness is most important. At the working temperature many materials combine with silica and cause stains or devitrification. In addition to normal cleaning the surfaces are wiped with cotton wool dipped in alcohol. The cleaned surfaces must not be handled as finger marks are sufficient to cause devitrification. 

The preparation of the tungsten. A number of methods for cleaning the surface of tungsten wire are described by Partridge.It has been found that centreless ground tungsten rod is clean and, provided the surface to be incorporated in the seal is kept free from contamination and finger-marks, it can be used without further preparation. 

The index finger marks the anterosuperior iliac spine. The middle finger traces the iliac crest curvature. The space between the index and middle fingers is the injection site. 

Kraton polymers blended with polypropylene can provide films with elasticity and strength, puncture resistance, low permanent set to prevent finger marks and indentation due to handling, high oxygen permeability, moisture-barrier properties, and clingJ ]... 

Beside these aspects, several other types of trace can also be found on docvunents. Among them, finger marks, if present, can be easily revealed on almost all types of paper DNA can often be extracted from saliva that could be present on the back of stamps and the use of electrostatic detection devices allows examiners to reveal latent marks on documents. 

Finger mark n. A defect of woven fabrics that is seen as an irregular spot showing variation in picks per inch for a limited width. Causes are spreading of warp ends while the loom is in motion and pressure on the fabric between the reed and take-up drum. Kadolph SJJ, Langford AL (2001) Textiles. Pearson Education, New York Vincenti R (ed) (1994) Elsevier s textile dictionary. Elsevier Science and Technology Books, New York. 

Polished zinc surfaces, such as organ pipes, finger-mark very easily when handled such marks may be hardly visible initially, taking hours or days to develop, but once evident, they remain conspicuous even after the metal has tarnished. To avoid finger marking on zinc surfaces, the objects are sprayed (before handling) with a clear light-fast acrylate or methacrylate varnish (dry film thickness 10-15 pm). 

The marks may be enhanced by clear lacquer finishes. If this happens, any lacquer finish must be stripped off and the marks treated as under Section II. B. Local repolishing may be necessary. Finger marking can be avoided by wearing fabric gloves and can also be suppressed by the sparing application of white vaseline (laboratory chemical grade), rubbed on with a clean, soft cloth. 

Mushroom dermatitis can be seen in those exposed occupationally [187], as the allergy seems to be limited to the uncooked material. In Japan and certain other countries, a characteristic eruption follows consumption of an edible mushroom, Lentinus edodes [257], if it is uncooked. This begins with an erythematous, papular rash in lines suggestive of finger marks some 1-2 days after the mushrooms are consumed. Externally, it fits a hand-transfer pattern, but it is best known as an eruption following ingestion. Histologi-... 

Daniel was admitted 2 days ago with a manic episode, exacerbated by cannabis use. He lives with his partner, Sam, and their children Phoebe (3) and Jack (5). During a visit to the ward, you notice the children haw bruises to their faces and upper arms, some of which resemble finger marks. They seem wary of Daniel and hide behind Sam when he approaches. 

Cleanness of the part before immersion is critical, and all prehminaiy cleaning and handling operations [see flow chart (Fig. 5)] must be closely controlled for good results. Finger marks or residual grease on the surface of a part will interfere seriously with the coating process. 

Care must be taken to avoid contaminating the surfaces during or after pretreatment. Contamination can be caused by finger marking, by cloths which are not perfectly clean, by contaminated abrasives or by sub-standard degreasing or chemical solutions. 

Specify removal of oU, grease, finger marks, salt deposits, and various organic and inorganic contaminants from the surface before and/or after the programmed physical and chemical cleaning to suit the purpose. 

After cleaning is done to remove obvious surface contamination, such as soil, grease, oil, finger marks. 

After a cleaning process, removal of obvious surface contamination (such as soil, grease, oil, and finger marks) requiring specific chemical or physical treatments is usually carried out to produce a surface receptive to adhesion. Polytetrafluoroethylene (PTFE) and other fluorinated polymers are good examples of surfaces having this requirement. Adhesion to clean, pure, PTFE is close to zero and it is only after a severe chemical treatment, which alters the surface chemically and physically, that the surface is receptive to adhesion. 

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