I prefer ‘mosaic sphere’, but I do like the irony of choosing to make a ‘gazing ball’ while recovering from eye surgery. It just happened that I found some polystyrene balls at Zart Art in Box Hill – and their special ‘will glue anything to anything’ Supertac glue – a few weeks ago. After the surgery I decided to give the mosaic sphere thing a try. It’s much easier to see tiles than warp threads at the moment (not that this is stopping me weaving). Since the spheres aren’t going to be touched or walked on, I could happily use broken tiles with sharp edges and glass tiles with the colour on the surface – which gives me a good use for the tiles I’d bought for the ventilation hole patches that turned out to be unsuitable.
For my first sphere, I had no plan. I just made it up as I went. First some yellow lines to break it into quarters, then flowers out of orange, green for leaves, and lastly filling in the remaining spaces with blue and green. I used up most of the triangle and square glass shapes in those colours, and added some cut glass tiles from Bunnings. I only needed to cut tiles smaller at the end, when I was filling gaps.
The grouting was, er, educational. One day I’m going to learn not to make two to three times as much grout as I need. I also made it a bit too wet, so at first it sagged out of the cracks on the underside of the ball. But I kept adding and smoothing and wiping until it had stiffened up enough to stay put. I did a second coat when the grout had thickened a bit more, too.
I’d watched YouTube tutorials that said the ball should be covered in mesh and mastic so the tiles have something to stick to. I tested the Supertac glue by sticking one tile on then holding the tile and seeing if I could shake it off the ball. It held, so I figured it was worth the risk just using that. The one time I tried to remove a tile that had shifted, I couldn’t even carve it off with a knife. Eventually it came loose, but only by taking a chunk of polystyrene with it. Fortunately the glue stuck it back on just fine. The grout wasn’t inclined to stick to the polystyrene where the gaps between tiles were wide, so for my next sphere I’m making sure all the surface is covered in glue.
Yes, I’ve started another one.
It’s rather addictive.