Did you ever notice how poor the copying is on most of the antique books? Misspelled or missing letters all over the place. It has improved some over the years ,but it is still lacking quite a bit.
Here is some information, maybe one of you can use, to make it better. I should have passed this on, when I first realized it 25 years ago, but I just kept forgetting it, whenever I was talking to someone, who might have used it.
Some of the problems are actual differences in the way a word was spelled 100 to 200 years ago vs now.
The main reason though , was that the printing was done by individual pieces of 'type". Each letter is a single lead piece that was placed on the end of a piece of hardwood at "type high" then it was placed into a "stick" a slotted piece of {at first wood , then changed to steel} used to hold everything in place. The type was all made to be very close to the same height, but the problem occurred when the type was being pressed against the sheet of paper, in the actual printing process. An expert could set the press up with just enough "packing" behind the impression sheet , to just kiss the paper and leave a beautiful smudge free image . On the other hand , a worker with less skill would always add more packing , until there were no voids or missing text and call it good.
This invariably caused the type in some areas to either dent the paper or even smash through it . That is what causes the new optical equipment to make so many errors or leave blank spots.
If you have a book printed before 1853, it was probably printed this way and will have the telltale marks of some letters being smashed into the paper further than others.
Here is some information, maybe one of you can use, to make it better. I should have passed this on, when I first realized it 25 years ago, but I just kept forgetting it, whenever I was talking to someone, who might have used it.
Some of the problems are actual differences in the way a word was spelled 100 to 200 years ago vs now.
The main reason though , was that the printing was done by individual pieces of 'type". Each letter is a single lead piece that was placed on the end of a piece of hardwood at "type high" then it was placed into a "stick" a slotted piece of {at first wood , then changed to steel} used to hold everything in place. The type was all made to be very close to the same height, but the problem occurred when the type was being pressed against the sheet of paper, in the actual printing process. An expert could set the press up with just enough "packing" behind the impression sheet , to just kiss the paper and leave a beautiful smudge free image . On the other hand , a worker with less skill would always add more packing , until there were no voids or missing text and call it good.
This invariably caused the type in some areas to either dent the paper or even smash through it . That is what causes the new optical equipment to make so many errors or leave blank spots.
If you have a book printed before 1853, it was probably printed this way and will have the telltale marks of some letters being smashed into the paper further than others.