What is Riso?
Riso is a printing process that is known for its textures, fluorescent colors and quirks that make this medium so charming. Similar to screen printing, every color layer is printed individually and placed one on top of the other.
A stencil is made for each color layer and is then placed on the ink drum. The drums will rotate to print on the passing paper. Our printers can print 2 color layers at a time.
Riso translate images in its own unique grainy visual language. When choosing the grain option, the printer will recreate the image by placing small dot in a random speckled way.
Screen Mesh Texture
This options imitates an old-school screen printing texture. Ink dot are placed in a mechanical order to recreate the image. The colors will be a bit darker using this option. The size of the dots can be changed by adjusting the PPI size (points per inch) right before printing.
Color OverlayOur Colors
Riso inks are not fully opaque, giving you the ability to overlay colors. You will be able to make additional colors and create fun effects.
Color layers can be misaligned at random from one print to another and appear a little jumbled. It's part of the many quirks of Riso and what makes it so special. Every print is unique!
Riso ink never fully dries, it gets absorbed by the paper. Each print will feel like newspaper ink to the touch and also similar to watercolor. This gives every copy a handmade look by retaining the artistic qualities.
The thickness range accepted for Riso is 46-297g/m2. From newsprint papers to #100-110lbs cardstock depending on the strength of it. Riso can print on matte and nonglossy papers only.
Our machine prints 2 colors at a time. Please consider that a 12 to 24h drying time is needed every two colors.
The smaller the details the bigger the misalignment gap can feel. Important details like small eye or pupils can shift and look a little funny. Make sure that a 1-2mm misalignment on every color layer will not impact the look of your work too much.
To conceal potential misalignment gaps you can apply trapping to your work. This means creating a stroke around a shape that will overlay with the second color to hide the paper. The overlay may be uneven due to natural misalignment.
Because the ink never fully dries, Riso is prone to all types of smudging. To avoid smudging, you can try to keep the coverage light by lowering the opacity of the art work. An optimal project uses 2 colors, but we recommend a 4 colors maximum per project.
In some occasions, if the art work has a high ink coverage in the tire feed area some marks may be visible.
Is Riso more eco-friendly?
No printing method is perfect, but Riso has a slight edge
- It uses soy based ink and is without C.O.V.s
- The ink cartridges are recyclable
- It does not require heat to print
- It works better on recycled paper and does not print on glossy finishes
We can offer you a selection of recycled paper for your projects