Dyed-in-the-wool

[…] some Druggets with Thread, that are dyed in the Piece; the others are dyed in the Wool, i. e. the Wool of which they are made, is dyed of several Colours, before it is carded, spun, and weaved.

That cloth will keep its colour best that is dyed in the wool; and the vessel will longest retain the scent of that liquor with which it is first seasoned.

Smith was a dyed-in-the-wool typist and never really got used to writing on computers.

John Major was described by his opponents as a dyed-in-the-wool Conservative.

We all know a process, sir, by which the whole Essex Junto could, in one hour, be all washed white from their ancient federalism, and come out, every one of them, an original democrat, dyed in the wool!

He might truly be termed a legitimate son of the revenue system, dyed in the wool, or rather, born in the purple; since his sire, a Revolutionary colonel, and formerly collector of the port, had created an office for him, and appointed him to fill it, at a period of the early ages which few living men can now remember.

Although appreciating the rapidity and frequency of the Southern electric services I was now to use on short journeys, I became more than ever convinced that electric traction offers very little of interest to the dyed-in-the-wool railwayist.

For all he says he isn’t, he’s a bit of an ultramontane, in practice though not in theory, and we can’t have that in the Church of England, we must stay dyed-in-the-wool Anglican.