Different material, mark making

Using the back of my sketchbook, I started making mark using different materials. I really liked the way my compositions using my coffee stained material turned out therefore I want to re-create the marks but with different materials. For this, I used a sponge, cardboard and an cheap paint brush.

This was created us a small piece of cardboard cut neatly into a square. I was really unsure about using this type martial, I thought it would create really contrived lines showing no expression at all.
I couldn't have been more wrong.
The cardboard created subtle lines enclosed by bold streaks which contained a mix of the colours. I feel that I could use this technique throughout my sketchbook because it creates a simple yet very involved piece. It clearly relates to my artists work and the way they choose to make marks. In addition to that, I feel that it relates to layers well, the lines "layer" up on top of each other, I also think that I can create some really interesting experimental pieces with this.

The next piece of material used was a sponge. I feel that it gives little texture, which disappointed me because I thought the small holes you can see within the sponges top layers would create a gentle print in which I could layer up on top of each other. However I don't feel that this worked very well, the sponge obsorbed too much paint therefore the paint dragged thickly across the page, creating fixed expressive lines. To conclude I feel that I won't be using a sponge to create marks within my sketchbook again, however I can easily involve the texture that a sponge gave without any things else being added to it. 

The final material used was a paint brush. Although it's not a material, it was a old groggy paint brush with about six strands therefore I've classed it as a material. I didn't like this at all, I tried to move my brush freely across the page, however it just slowly dragged creating an very contrived mark. On a positive note the brush did create light mark when pulled across a small section of the page fastly. I feel that I could use this within my sketchbook, to create simple backgrounds.