Grain
This basically adds a random monochrome noise to the image which makes it look like a coarse grain was used.

Contrast
The contrast setting either increases or decreases the contrast of the film. Setting minimal contrast results in a medium gray-color image whereas settings the maximum value will make the image nearly black/white without intermediate shades.

Response
The response of a film is the speed at which it reacts to the light being projected onto it. Basically a higher responsiveness is used when there is too little light to give the photograph enough contrast.
This setting adds or subtracts light from the picture.

Monochrome
As everybody knows, old movies did not have any colors in them and this is exactly what the monochrome feature does. By checking the box the picture will be converted to black and white.
The selector box next to the checkbox allows you to give the monochrome image a color tint for even more authentic reality by selecting one of the predefined colors.
The color box is used to show the tint that will be applied ot the image and allows you to manually specify a color by clicking on it.

False color
Nowadays, a lot of old black & white film and photographic material is being hand-colored. This hand-coloring process creates a strange artificial type of color, where the hue of the color is identical for certain areas with only the intensity changing, based on the old black & white material.
The false color checkbox simulates this effect by splitting the hue and saturation information from the intensity and equalizing these areas to be combined with the intensity information again, creating an effect very close to the hand-colored effect.

Corner radius
Some old film has rounded corners instead of straight 90° corners. This setting will allow you to add rounded corners of any size to the picture.