If the cause of white spots on the skin is actually a worm infection, this should be confirmed with a stool sample so that treatment can be initiated. Some food can also cause white spots on the skin, especially those with calcium, vitamin D and vitamin E, like milk, sardines, butter and peanuts. However, white spots do not always appear with worm infections. With a worm infection, it is possible to have an impairment in the absorption of vitamins and nutrients through digestion, and this can cause white spot on the skin. If you have any concerns, consult a dermatologist for assessment and possible treatment. White spots with uneven edges and different textures or colours can be a sign of non-melanoma skin cancer. What to do: You should see a dermatologist to confirm the diagnosis and start treatment to avoid any complications, such as seizures or even kidney problems. These patches are often first seen in infants or children up to the age of 6, and can appear in various quantities (ie. This will eliminate white spots on scanned images made by dust. If the pressure retards development the yellow dye will not blossom and mark shows up as blue.Also known as Bourneville disease, tuberous sclerosis is characterized by the appearance of white patches that are scattered throughout the body (although they are most commonly found around the trunk). 1) scan the same photo twice with rotating it (in scanner) by 180° second time, or simply with moving it a little 2) align image contours of those two scans 3) combine scans using darker pixels of two images. On color negative film, the top blue layers shows yellow if the effect is positive. Conversely, pressure applied while the film is immersed in the developer tends to retard development producing a negative density. Pressure applied to film prior to developing is generally positive meaning plus density on negative film and minus density on slide film. Do not rule out a pressure effect even if you cannot see a surface blemish.Ī pressure effect can yield both a positive and a negative effect. A 10x Hastings Triplet should be in the gadget bag of every serious photographer.Įxamine the film by both transmitted light and reflected light looking for a surface deformity. Best is the type used by jeweler and coin collectors. I advise examine the surface, at the location of the spot, using a 10x magnifier. Sometimes the mark will have surface damage such as an abrasion, scuff, or scratch. Since the blue emulsion is on top, it is the most suitable. Because color film consists of multiple emulsion layers, some are more susceptible to pressure than others thus the colors seen are in relation to which emulsion is most affected. Pressure applied to the film will trip off the silver salts and renders them developable. This is the result of excessive pressure, usually caused when loading the film onto a reel for developing. Film is not only sensitive to light and heat, it is sensitive to pressure. However, it is my opinion that these are pressure marks. It is difficult to make a diagnosis, not having the film in my hands.
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