Many people (including artists) will agree that Posca paint markers are the perfect tools to color on almost any kind of surface. Posca markers are water-based, but the paint is both opaque and a fluid, smooth and dense with wide coverage. It can be mixed, diluted and overlaid. The final rendering is actually similar to that of acrylic.
So, how to mix colors?
You can mix them directly onto the surface as long as the paint is wet. There’s no need to pre-mix them in a different bowl or palette.
How to overlay colors?
As Posca’s paint is opaque and dense, it’s ideal to overlay colors. As the pain dries quickly, you can cover a layer by a new one within a minute and without smudges. Even light colors can perfectly overlay with dark ones.
What do you mean by Watercolor effect?
You can create great gradation effects with posca’s paint, also refered as a watercolor effect. You only have to be careful you perform it before the paint dries. Once the paint has dried, you cannot dilute it but you can overlay the colors
How to choose the correct tip size?
Each person has their own personal preferences and point of view on the size and possible usage for each marker, but as a general approach we suggest these tip sizes because of the great lines they can produce;
Posca PC-5M (medium 2.5mm), PC-8K (broad 8 mm) and PC-17K (extra-broad lines 15mm) works great for Flat Tints.
Posca PC-1MR, PC-1M (extra-fine 1mm) and PC-3M (fine lines 1.5mm) are great for drawing neat outlines.
How can I correct a mistake?
Posca’s paint is permanent on porous surfaces, but as it is a water-based pigment, it is removable on non-porous surfaces such as glass.
If you applied it on porous surfaces, the best way to correct a mistake is to overlay. You can do this as many times as needed. All you need to do is wait until the previous layer has dried before applying a new one.
Finally, what kind of materials can I use my Posca markers on?
Posca’s quality and resistance has been tested on a vast number of surfaces. It has been tested in detail on more than 55 different materials’ including wax, eggshell, photo paper, tracing paper, denim, porcelain, vinyl, leather, fabrics, rocks, metals, clay, wood, etc.
Posca marker adhere perfectly to all types of paper and cardboard. It won’t bleed and is ageless. The adherence can be further enhanced with varnish.
Posca works wonderful on clays, stones and rocks, cement, etc. Its adherence is perfect and the line definition is fine. You can apply a varnish or bake in the oven (depending on materials) to optimize its adherence and resistance.
Posca is ideal for ceramic and porcelain. Once baked in the oven at a low temperature for half an hour, they will become permanent. Just notice that it is not suitable for dishwasher use.
Posca is ideal for cresations on wood. Depending on the kind of wood and it surface, you may have to perform some actions to optimize the adherence.
Posca has been tested on indoor and outdoor metal surfaces and the general adherence, line definition, resistance to rubbing and water is very good. It’s suggested to varnish with a spray (two or three coats) for a better resistance.
Posca can write on any type of fabric and is resistant to washing once it has been ironed. Of course, the resistance will depends on the type of fabric. To fix colors, iron the fabric on the reverse side, using no steam.
Posca adheres perfectly to latex, vinyl or PVC (ironing under a cloth)
The results will depend on the type of plastic. Please refer to the file at the end of the post.
Posca can be either permanent or non-permanent on glass. If you want to have it permanent, just bake it in the oven. Otherwise, you can always clean it off with a damp cloth.
Please refer to the following file for more details on materials in this Posca Markers Official Testing Chart– of course, you can try it on any surface and share with us the results!
You can find some good ideas in the following pictures and videos