Introduction
Photographic paper is divided into three categories according to the way of outputting images, namely silver salt printing paper, inkjet printing paper and printing paper in the traditional sense. At present, photo paper is widely used in the market for professional image output fields such as wedding photography and children’s photography; as well as advertising materials, menus, business cards, resumes, and various public fields for home office use. This article will introduce the difference between suede photo paper, glossy photo paper and silk photo paper.
Photo paper classification Introduction of silver salt printing photo paper
Silver salt printing photo paper is a traditional photo paper, which has a certain wet strength, acid and alkali resistant thick paper, high stiffness degree, folding endurance. The paper is coated with a photosensitive emulsion, and it is imaged after light irradiation and chemical development, and its image can be maintained for a long time. On the barium paper made of high-quality photographic base paper evenly coated with a coating made of barium sulfate and alum adhesive, after coating the photographic emulsion made of gelatin and silver halide, Apply a protective film over the emulsion coating. By changing the ratio of silver halide and gelatin in the photosensitive emulsion, controlling the curing conditions and adding sensitizing pigments, etc., printing papers with different sensitivities can be obtained. According to the different types of sensitizers in the coating emulsion, it is divided into different types of printing paper.
Types of silver salt printing photo paper Glossy photo paper has high brightness and good reflectivity, but it is easy to be stained with fingerprints, and its clarity is the best, generally suitable for product photos, art photos, and landscape photos; Relatively rough, non-reflective, not easy to stain with fingerprints Silk texture, silk luster under the light, gorgeous and delicate, very three-dimensional. Introduction to Inkjet Photo Paper
Inkjet photo paper is a receiver for ink ejected from the nozzles of an inkjet printer, and images or text are recorded on it. Its basic characteristics are fast ink absorption and non-spreading ink droplets.
The specific requirements are good recordability, strong ink absorption, fast ink absorption, small ink droplet diameter, and approximate circular shape; fast recording speed, that is, high density, continuous gradation, and clear picture ; Good preservation, the picture has certain water resistance and light resistance, and has certain preservation and fastness indoor or outdoor; Resistant to bending and bending. Inkjet printing photo paper classification Cast coating type adopts micron-scale silica process, and the brightness and whiteness can reach the level of traditional photo paper, but the paper base is paper paper base; Intumescent type is mainly composed of polyene (PVA) material. The moisturizing coating is applied on the base paper; the microporous technology RC coated photo paper adopts the silica process to form an inorganic-organic composite particle ink, which is immediately absorbed by the honeycomb-like micropores and is called microporous photo paper. The paper base is the same as the traditional photo paper, and is coated with a waterproof PE coating on both sides of the base paper, which is called RC waterproof photo paper. Introduction to Printed Photo Paper
Printed Photo Paper is a digitally printed substrate, and its surface has a good affinity with electronic ink, which can make the electronic ink firmly fixed on the surface of the substrate. It has good waterproof and anti-blocking properties, and the image after printing has sufficient reflection density.
Printing photo paper classification Double-sided fine-pile digital printing photo paper has a smooth and delicate printing effect, and can be printed on both sides. It is mainly used for high-quality image output applications such as albums and photo books. field. Hanrong digital printing paper has soft printing image, which is generally used for high-end image output, such as landscape photography, art photography and other application fields. Pearlescent digital printing photo paper has excellent pearlescent effect, reflecting elegant and shimmering texture, mainly used for high-quality portrait work output, product promotion album, creative work display and high-quality album production. The difference between suede and glossy photo paper Glossy photo paper
has high brightness and good reflectivity, but it is easy to get fingerprints, and it is also easy to stick (such as plastic paper, etc.). In terms of clarity, the glossy surface must be the best, and it is generally suitable for product photos or artistic photos and landscape photos. The glossy surface looks glossy, with high definition and slightly better picture quality, just easy to stick to handprints. Glossy surfaces need to be glued for preservation.
Glossy photos are suitable for expressing scenery, scenery and other subjects with bright colors and high contrast requirements, and landscapes are suitable for glossy surfaces. There is also a light selection surface with a generally smaller frame and a clearer image.
The glossy photo paper has high brightness, good reflectivity and strong vividness. The surface of the photo paper is smooth, and the photos appear brighter; but it is easy to get fingerprints, and it is also easy to stick to debris such as plastic paper. It is suitable for product photos or artistic photos, and the clarity must be the best glossy surface.
Suede photo paper
Suede photo paper (also called matte photo paper or matte photo paper), because the surface of suede photo paper is relatively rough, the texture of suede photo paper is good, and the surface has Matte feeling, no reflection, not easy to get fingerprints; but the degree of translucency is low, not as bright as glossy photo paper, professional photographers prefer suede.
The surface is relatively rough and has no reflection, so the texture of the suede photo paper is good, the surface has a matte feeling, and it is not easy to get fingerprints and it can be stored for a longer time. However, the degree of translucency is low, and it is not as bright as glossy photo paper. Professional photographers prefer suede. At the same time, due to the grainy surface of the suede photo paper, the blurred photos and portrait photos will be better washed with suede. The suede looks like a flannel, a little rough, and the picture quality is slightly worse, and it is not easy to get fingerprints. The suede can be stored for a long time without being glued again (but pay attention to waterproof, moisture-proof and anti-corrosion).
Suede photos are softer and are especially good for people. Portraits fit suede. If the general life lighting surface is brighter (the glossy surface is stronger in color, layer, etc.), if it is placed in a photo frame with glass in the front, the suede surface will not stick to the glass for a long time. The larger the format, the more suede the image is slightly rougher.
At the same time, due to the grainy surface of the suede photo paper, the relatively blurred photos may be better washed with suede, which has a longer shelf life and is generally used for ordinary life photos.
Silk Photo Paper
The silk surface has the effect of silk, which is easier to store than suede, and can be well preserved without plastic sealing or cold lamination. The silk-faced photo paper has a silk texture on the surface, which shows the luster of silk fabrics under the light, which is gorgeous and delicate, and has a very three-dimensional effect.
Photo paper identification method Pull out the paper from the packaging bag, lay it flat on the table, wait for half an hour, and check whether the two sides of the paper are up or down. If there is serious warping, it is proved that Paper is defective. This is mainly because the coating on the front and back of the photographic paper has a great relationship with the quality of the coating and the temperature control of the production workshop. Once the warping is serious, sometimes the printer will not feed paper or jam. . Visually inspect the surface for scratches, punctures, or black spots. If the above conditions appear on the surface, the photographic paper is proved to be unqualified. Because the coating workshops used by high-quality manufacturers are all dust-free workshops, under normal circumstances, there will be no problems such as scratches and black spots on the coating surface. Only small factories will have the above problems. Look at the surface smoothness and flatness. Good photo paper has a smooth surface to the touch. And it has a plastic texture, while the poor photo paper is dry. You can use your finger to dip a little water and apply it on the photo paper coating. If it is smooth, the photo paper coating is qualified. If it feels astringent or sticky, it means that the coating quality of the surface layer of the photo paper is not good, and the waterproof performance is not very good. Identify whether it is a gel or powder coating. In the coating of photographic paper, it is divided into colloidal and powder coating. The cost of gel coating is high, and the smoothness, tightness, color reproduction, and waterproof performance are far superior to powder coating. Identification method: You can fold the upper corner of the photo paper inward, and fold it several times along the crease. Then stretch the crease. Good photo paper will not appear to be powdered at the crease. On the other hand, the poor photographic paper has the phenomenon of powder falling, indicating that a low-cost powder coating is used. This type of coating can cause serious damage to the printer. Look at the whiteness of the paper. There are two kinds of white in the identification of paper whiteness. One is natural white (red) and the other is fluorescent white (blue). Research by foreign experts has shown that blue light has a considerable harmful effect on human eyes, and the added phosphor also has a carcinogenic effect. Therefore, all domestic export photographic papers use high-grade photographic base paper and coating. Thereby presenting a reddish white. Inferior paper, on the other hand, appears bluish fluorescent white. Look at the bottom of the photo paper. The domestic high-quality photographic paper adopts imported photographic base paper or cast-coated base paper produced by Shanghai Lucky Company. The market price is around 9,000 yuan/ton. The inferior photographic paper just uses low-cost white card as the base paper of the photographic base. This type of base paper feels thick and bluish-white. Flexibility and poor. Distinguishing method: You can visually inspect the back of the photo paper. If the paper is blue, it means that it is a white card, and if it turns red, it means that it is cast-coated base paper. Also, rub the photo paper vigorously with your hands a few times. If there are cracks, it means white cardboard. If there are no obvious cracks, and there is no powder drop phenomenon, it means that it is the base paper. The white cardboard paper feels harder and thicker, and the coating is often very thin, making it difficult to achieve the vivid effect of color reproduction. To identify the waterproof performance, drop a little water on the surface of the photo paper, and observe whether there is water seeping out from the front of the paper after a few minutes. Adjust the printer to an appropriate DPI, and observe the printing effect of the paper and the fast drying speed of the ink. Take out the whole package of photo paper and observe whether the cut edges are neat. You can go to China Trademark Network to check whether the brand you are using is registered. Precautions for the use of photo paper When using the ink cartridge and photo printing paper, be sure to use the items in the same package. The glossy side of the photo paper is the printing side and must be loaded into the tray with the printing side up. Imaging photos cannot be printed when misplaced. Do not touch the photo print or fingerprints left on the surface of the print will produce poor results. If there is slack in the ink film of the ink cartridge, please tighten the film in the direction of the arrow and then put it in firmly. After printing with a word processor, do not touch it immediately, otherwise smudges and oozing may occur.
Storage Note: Because of the multi-layer structure of plastic-coated photo paper, long-term storage is likely to cause the emulsion layer to fall off due to different levels of water absorption and thermal expansion rates. Generally, the lifespan is not more than 40 years. Individual special image processes, under the premise of proper handling, have more preservation than paper-based paper due to their inherent stability. In the digital image production method, the first recognized by domestic image collectors and high-end photographers is the “art micro-jet process.” This process uses Epson Century Iridescent K3 pigment ink and Epson pure cotton acid-free paper, and the output works have high It has the characteristics of excellent color accuracy, large color gamut space, light resistance and oxidation resistance, and long-lasting collection, which can fully meet the collectors’ needs for the preservation of collectibles. According to the results obtained in the accelerated experiment, in the general indoor environment and the use of Epson’s specific pure cotton acid-free medium, the black and white photos can be stored for up to 200 years, and the color photos can be stored for up to 108 years. It is understood that in the autumn Huachen auction held in 2006, of the 133 works that participated in the auction, nearly 60 works were made by the Epson art micro-spray process. In the international market, the photos produced by the art micro-jet photo-making process have long been the first choice of museums, galleries and collectors. Do not place in the following places: high temperature, high humidity, direct sunlight. Please put the unused photo paper back in the original box and store it flat! (Please use up as soon as possible, so as not to affect the quality of printed photos).
