BLUE-BLACK WRITING PAPER.
Take of Aleppo galls, bruised, 9 ozs.; bruised cloves, 2 drachms; cold water, 80 ozs.; sulphate of iron, 3 ozs.; sulphuric acid, 70 minims; indigo-paste, 4 drachms. Place the galls and the cloves in a gallon bottle, pour upon them the water, and let them macerate, with frequent agitation, for a fortnight. Press, and filter through paper into another gallon bottle. Next, put in the sulphate of iron, dissolve it, add the acid, and shake the whole briskly. Lastly, add the indigo-paste, mix well, and filter again through paper. Keep the ink in well-corked bottles.
Grating three-dimensional printing is the image with a grating plate with a three-dimensional printing.
Grating is composed of a sheet by a cylindrical lens, the lens from the side when we look at the past, will see the other side of the sheet a very thin line on the image, and the location of this line determined by the viewing angle . If we increase this number in the image on different lines, corresponding to the width of each lens, respectively, arranged in order branches of the printing sheet in the grating on the back, when we observe from different angles through the lens, you will see a different image . Thus through the grating printed products, we get lifelike images and realistic three-dimensional picture effect of different changes
This prints the naked eye without any tools in the two-dimensional plane can be directly observed on an image three-dimensional images. People looked at these products must be very curious how it is produced it? It can observe objects naturally produce three-dimensional, because people have a certain distance between the two. When the observed object, left and right eye from different angles to form two different visual perspective. Consisting of a variety of images reflected in the brain, we have the sense of distance and dimension.
Folder Printing,Poster Printing
Envelope printing,Flyer Printing
Label printing,Notepad Printing