30

Here's a QR Code Stencil Generator which automatically generates thin bridges between islands. As mentioned by @Aloisdg : It is a Processing project and it is hosted on GitHub. I tested it successfully on the pavement last year. The pavement should be as slick as possible, though.


23

One approach to avoid the "island" problem could be to split the pattern into two stencils. In each stencil only the holes of every other row are cut out. First colour is applied to one of the stencils. Then the stencil is exchanged and the colour is applied to the other stencil. The weak point of this approach is that both stencil need to be placed at ...


18

Watercolor is, by its very nature, a transparent medium and so it becomes really quite difficult to manage this. However, there are a couple of things you can do to help: Draw very lightly and then use a kneaded eraser to lift the lines that you have left. The remaining lines will be much more faint than had you just drawn as light as you can. Draw on ...


14

Many people do this, it is common practice among watercolorists. Watercolor paints can be used in their wet form via a tube or they can be used as a dried over consistency. It has nothing to do with the paint being cheap or kiddie as another commenter said. It’s just preference to which consistency you prefer. I prefer to have the watercolor dried out as it ...


13

It sounds like your wife learned to paint with watercolor paints in pans, and/or learned from someone who only really knew of these types of paints: These are in a sense the ancestors of the kiddie watercolors you may have struggled with as a child, and thus you might think that they're lower quality than tube paints, but that's not actually the case: they'...


12

If there isn't enough separation in the levels of the values used in rendering an image then the image can look washed out or the shapes poorly defined. Someone saying, you need to "push the values", means they think you need to add more separation in the value levels you used to define your shapes and areas in the image as a way to help build greater depth,...


11

These are called "canvas keys". The are shimmed into the corners of the canvas to maintain the tautness of the canvas. This generally happens only on machine-assembled frames, or on mass-produced frames that have low-quality inspection standards (for cost).


11

India ink has only three ingredients: lampblack, water and gelatin or shellac as a binder(in fact, traditional India ink doesn't even contain this), with shellac being much more common. As you've guessed, this means that the clear liquid on top is probably a mixture of shellac and water. Shellac can be found easily online (if you can't find it in person) ...


11

What about a custom 3D printed embossing roller?


10

There are green areas in the photo, although they are not bold. Maybe your solution would be not to fade but to juxtapose bold colors. Yet, if you want to fade, painting by layers will have a cleaner mix than painting in impasto (glaze a very thin blue over the yellow). Also you could use dots of each color next to each other for a vibrant optical blending (...


9

Instead of spraypaint - consider a "pavement sticker" or "footpath decal" that looks something like these. A brighter background colour will help it stand out much more than paint on a dingy pavement/sidewalk. And you can peel, stick, stomp and go, whereas paint takes at least a minute to be touch dry, risking people standing in your tag. Paper won't ...


8

The paint does make a difference in whether or not you can easily paint over the background. Watercolor, for example, does not easily cover other art and you would need to use a different technique for the background if you used this medium. Most other paints (like acrylics or oil) are thick enough that you can easily paint over the background without any ...


8

There's a famous story about a ceramics professor who separated his class into two groups of students. The students in Group A were graded solely on a single pot they presented at the end of the semester, whereas the students in Group B were graded on how many pots they produced during the semester: quality vs. quantity. During the course of the semester, ...


8

Oil paint dries slowly and mixes well on canvas (A thin paint will stick to a thick paint). It also adds texture but shows brush strokes. You are going to want to work in a ventilated area. Acrylic dries very quickly and dries flat, diminishing brush stroke visibility. Once dried it remains flexible and can be painted over quite easily. When wet it is ...


8

If you are seeing online store references that sell items manufactured for US sales primarily, the inch figures are more likely going to be accurate. The conversion results, for your example, in 35.56 cm, but for marketing purposes, rounding is acceptable. I have no experience in metric-following countries, but I would expect the reverse to be true. It is ...


8

If you want to draw objects (humans, animals, or whatever) that are stylised (i.e. aren't too realistic) you need to learn how to draw them realistically first. The idea is the same as “learn the rules first in order to know how to break them properly” (sorry for the cliché). You need to understand your subject (what it actually is) in order to reveal it in ...


8

In my own personal experience, I have found that sellers do not publicly post their prices in order to remain competitive in the market. If they were to post their prices, a competitor can easily undermine that seller by decreasing their own prices for the same service in order to steal the customer and make the sale. Furthermore, by not publicly posting ...


7

From Understanding the difference canvas and linen: Canvas can mean different things to different people. In the context of painting, the word ‘canvas’ means a fabric used as a painting surface. The difference is that sometimes the canvas is made from cotton fibres and other times from linen fibres. Each material is worth looking at in more detail. ...


7

Generally speaking, acrylic is a cheaper and more forgiving medium to start with. As mentioned by other respondents, acrylic is fast-drying and can be painted over. You can also use acrylic media, such as glosses, gels, pastes, etc., to adjust the consistency and texture of acrylic paint. I personally use acrylic paste and gels to thicken the paint such that ...


7

More details regarding your objective would be useful, but one can expect certain commonalities irrespective of your final goal. First off, unless you are inclined to excessive labor, expect to not-paint the area of plastic between the contact areas. More on this later in the dissertation. The easiest way of masking out the contacts is just that, masking ...


7

How about buying some grid-shaped welded wire metal mesh (commonly used for rabbit or chicken hutches), and using sticky tape to cover the squares you want to mask? The wires would be thin enough that they wouldn't affect the scan, but strong enough to support isolated islands (much stronger than relying on tiny thin pieces of paper or card, which might ...


7

In short: No, you cannot make an effective primer out of paint. Primer is not just "paint without pigment," and the purpose of it isn't as a base coat; the purpose of primer is to prepare your surface to accept your paint. Some surfaces are too porous to take paint properly (wood, masonry), other may have issues with the paint adhering properly (plastic, ...


7

If the material is metal, one can use a wrinkle finish powdercoat to accomplish this result. It's not quite exactly the same texture, but wrinkle finish powdercoat may qualify in that it's random and irregular. Using search terms "texture powder coat" provides a number of similar finishes, including hammertone and silver vein, the latter shown below: If ...


6

The process is called working wet into wet. Wet into wet means the paint medium (be it water colour, acrylic paint, oil paint, ink) is applied to a surface still "wet" with solvent/medium. The solvent used to apply the previous layer of paint is still present on the surface where the new layer is being applied. The solvent has not yet evaporated (or the ...


6

You could try applying a frisket to the bird and flowers first (to isolate and protect your lighter more detailed areas) before beginning painting your background. Once your background color/colors have dried you can remove the frisket from the next area you want to paint by rubbing with an eraser. You can remove as much or as little frisket as you need to ...


6

There are a couple of ways that you can go about matching... The first is trial and error testing on scrap paper. It's tried and true, really, because all you do is look at the color options in your set and get close, then work with additional blending with other colors to match up. Take notes. :) The more "scientific" way is to use an application like ...


6

Your best option for "precision" may be a craft known as batik. It involves applying melted wax onto the fabric in areas you wish to remain clear of the color currently being created. This effectively creates a stencil for the portion to be colored. Either paint or dye would then seep into the fabric. The wax is then removed/washed out and new wax applied ...


6

The drawing of pictures in manuscripts is known as Illumination* The Wikipedia article on the subject (as mentioned in a previous answer) contains a wealth of information on the subject, including this gif showing the steps: Image from Wikimedia commons: link Steps involved (from the image caption): I. Graphite powder dots create the outline II. ...


6

Your islands can become insignificant by creating stencil like bridges to the more solidly founded segments. A bridge of a few millimeters will bleed paint underneath but also will be small enough to be ignored by the QR software from a distance appropriate to the size of the code print. If the few millimeters is excessive, hot glue applied to ordinary ...


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