Cleverly clean the stains on photos

First, clean the handprints on the photo. You need to prepare a basin of clean water. We first put the photos stained with handprints into the water, and then gently wipe them with a cotton swab or tissue to clean them. Tip: ①. When cleaning photos in water, be sure to touch the photos gently and never rub them hard; ②. Do not soak the photos in water for too long. Wipe them immediately after entering the water, otherwise the color of the photos will be damaged. After wiping, you will find that under the action of water, the handprints on the photo are gone.

Next take out the photo and paste it on the mirror, so that the photo can be curled and deformed, and then blow dry the photo with the hot air of the hairdryer. Tip: ①. The hair dryer should not be too close to the photo, and should be kept at a distance of about 30 cm; ②. The temperature of the hot air should be controlled in low gear or medium gear, and should not be too hot. After the surface of the photo has dried, remove the photo from the mirror and place it on a flat surface. Then use a hairdryer to dry the other side of the photo. The temperature of the hairdryer is also required not to be too high and be about 30 cm away from the photo. After such processing, you will find that not only the handprints on the photo are gone, but the photo is still as intact as before.

　When you see this, you will definitely wonder, can all stains be removed in this way? Next, we use the same method to remove the pen in the photo. First, put the photo in clean water, and gently wipe it with a cotton swab. Soon the pen on the photo disappeared without a trace. In order to make the photo as intact, then stick the photo on the mirror and use the low-end hot air of the hairdryer to dry the photo at a distance of 30 cm from the photo. Then put the photo on a plane and blow dry the back. After this treatment, the pen on the photo disappeared, and such a meaningful photo returned to its original appearance.

After many experiments, we found that the trick method can also remove tomato juice and milk liquid from the surface of the photo. However, for stains such as black tea and coffee, after cleaning according to the trick method, the lighter colors will still leave traces, but there will be no traces in the darker colors.

Then why can you remove stains by gently wiping them in water? In fact, this makes the photo structure very well. In fact, if you analyze the horizontal section of the photo, you will find that the photo can be divided into two levels: printing paper and colored paper. And to prevent the photo from discoloring, its surface is a layer of transparent filter paper. Filter paper has the property of soluble in water. If you wipe the stain with a damp cloth, this part of the filter paper will become soft, resulting in deformation and leaving traces. However, if the entire photo is put into water, the filter paper on the surface of the photo will soften, and it will be difficult to deform even if there is friction, so the stain can be easily removed.

　　Finally, I would like to remind you that the photos washed after taking photos with a digital camera are not suitable for this method, because the photo paper it uses is not this kind of ordinary photo paper.