I had to completely finish my sample piece so I could try this out. I bought some Camp coffee (an old fashioned chicory and coffee liquid mix), some gravy browning (I was amazed this stuff is still made, contents:colour E150c (is this caramel?), water, salt, and glucose syrup) and a box of the very cheapest super market own brand teabags.
Last night I boiled about 10 teabags in a saucepan of water. I poured off the liquid into a jug and then to a spray bottle.
This is the before shot.
This is after spraying with the very cold strong tea. I felt the colour was a bit too even, so
I placed one of the wet cold tea bags in a couple of places and squeezed it over others.
In real life the contrast is not as great as it appears in the photos. And of course I have to wait for it to dry to get the final effect. Fingers crossed. I'm also wondering about putting it in the tumble dryer or setting it with my steam generator iron.
And should I wash it afterwards or not?.....
And it does seen at the moment the Camp coffee and gravy browning are superfluous.