SAKURAKoi Water Brush - Water Brush for Watercolor - 9 ml Tank - Large Brush Tip

Overall, it’s a well made product but I find it difficult to get any consistency in terms of the amount of water released onto the brush. It will definitely be very convenient for traveling, which is a huge plus, and the bristles are smooth with good snap. You can achieve good blending, but unless I was traveling, I wouldn’t use this in favor of traditional brushes. It’s just not as effective.

I did a little drawing with it right away with watercolor pencils. It came out beautifully! I can't wait to do a regular watercolor in a larger size and then use this for accents. This seemed to bring out just the right amount of water.I can't wait to try it for field paintings. I think it would be great for everyone to have one of these and a basic set of watercolor pencils. If you ever travel or just want color sketches, this is for you. I also love the idea that I don't have to pull out all my supplies now to do a little quick watercolor.Even though I bought the large size, the synthetic white brush comes to a fine point and lets you do little details.

This water color brush is terrific, just what I wanted. It holds enough water for me to use it easily ( while using my lap desk in my easy chair at night while watching TV) without getting up to refill it. Also, the nylon tip is small enough to get into corners-such as flower tips and leaves. The brush comes apart by unscrewing the tip from the bottom water holder and makes it ideal for travel. I did have one small issue about the waterbrush, however. The water holder has a plug that you have to remove in order to use it. Since I easily misplace even large items, I just didn't know what to do with this 1/4 inch (about) sized plug. It was fortinuate for me to have ordered a watercolor box in the same order and my solution was an easy one. I placed the plug in the far left well next to the lid and taped over the well with clear tape. Now, when I'm not planning to water color with it for awhile, I can easily remove the clear tape and pop it into the holder. Easy peezy.

When I started using my travel watercolor set, I wanted to carry around with me a brush that was easy to maintain (meaning, me not having to bring a small water cup to clean). Then I found this little gem and I couldn't be happier.The size of it is pretty convenient to carry around and its easy to clean. I mainly use this for small little illustrations in my sketchbook and its done its job pretty well (If I wanted to do more serious watercolor paintings, I'm not sure I would use this brush.. but it still does a great job for my small doodles). It carries a pretty decent amount of water and I'm able to do quite a bit of painting before I need to refill it (if you want an even smaller water brush to carry, there is also a 4-ml water tank). I'm also able to get pretty decent line quality with it. Although my only gripe with this water brush is that it leaks more water than I'd like.. but a simple dab on a paper towel will fix it.If you're looking for a decent water brush that can be carried on the go, I think this one is a good place to start.

The #6 medium brush is my favorite to use. I have a collection of five medium Koi Watercolor brushes that I paint with as I travel throughout the city of Denver. The water seems to flow best with the #6 brush size. I like to paint with watercolors &gouache with this brush on watercolor paper, claybords, and aquabords.I have tried the small and large Koi waterbrush sizes- the small brush squirts out too much water too quickly and is hard to handle. The larger brush seems to have trouble getting the water to flow at all, and when I squeeze too hard it sometimes squirts out and drowns out the painting that I am working on. If you want a water brush that is durable and easy to use with consistent water flow, I recommend the Koi brush in the #6 medium size. I tried another brand's waterbrush once and it was just not the same... go with Koi if you want to try waterbrush and painting watercolor & gouache on the go.

I received one of these as part of my Sakura Koi watercolor set and loved it so much that I bought another to use in another travel watercolor kit. They don't leak and I love the fact that they can come apart and you can fill it then put the plug inside so you have a ready to go full water tank but in a full size brush that can fit in my Cotman Deluxe Sketcher's Pocket Box that I have refilled with a set of W&N professional pan paints. I've tried the Pentel version and found I didn't like the water flow and it didn't allow me to fill it and yet keep it compact by being able to remove the brush portion. Very happy with this and may order the smaller brush size as well.

A lot of YouTube crafters really like this water brush, and I thought I would give it a try because I'm always having to squeeze my Pentel Aquash to get water flowing. This brush is the exact opposite: you can literally wet a dry medium with what flows through the brush tip and it's still almost too wet to paint in small details. I'm somewhat appreciating my Pentel a little bit more now, but somebody who wants to paint on the go without a source of water might like this brush.

Unfortunately I either got a dud or I just hate this brush. I was so excited to get it and the reviews are great but I have to squeeze the barrel so hard to get even the tiniest amount of water to the brush that the water leaks out the the threads. I looked for a place to contact the company but could not find one. I am very disappointed to say the least.Updated, I read a review somewhere to someone else that had this problem. They suggested checking to make sure that there was not a little plastic plug in the valve that was not supposed to be there. Sure enough mine was plugged! Now water is making its way to the brush. I will change my review if the brush is useful now. I am so glad that there was another reviewer that gave this information, so thanks to whomever that was.