In our Chemistry@work days at Daresbury lab we often share our colour change straws - thermochromic plastic
our heat sensitive paper - thermochromic ink
and our colour change shower curtain - hydrochromic technology.
Our latest purchase is actually a toddler playmat but it uses hydrochromic colour change technology to allow young children to draw using only water.
Remember those magic painting books where you only used water and colour appeared - well think like that but re-useable!
Our mat is in rainbow colours so using a water filled pen you can draw or using a brush you can paint and even use stamps on a water mat. Water reveals an almost magical rainbow of colour which eventually fades away as the mat dries. You can see the appeal to parents - no mess and the only consumable is water!
Our idea is to ask the school groups to sign in with a graffitti style tag which we will display throughout the session but by the time the next group arrives it will have dried out and faded ready to be used again.
Along with our UV colour change loom band bracelets
we think we have a winning summer fun session for our last Chem@work day of this acadmic year