CHAPTER 6 OF FORENSIC PHOTOGRAPHY PART 2

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CHAPTER 6 OF FORENSIC PHOTOGRAPHY PART 2

43 questions • 1 y ago🫀😇

Question list

There are only a few in the ASA 1000 to 3200 range, and these are for special purposes. Are designed for use in very poor conditions when you can't lighting or don't want to add artificial light, or they are used for obvious grain effects.

SUPER FAST FILM

The ability to detect light or other signals as a function of their wavelength or frequency

SPECTRAL SENSITIVITY

rays and blue light only. sensitive to ultraviolet

BLUE SENSITIVE FILM

film-sensitive to ultraviolet rays and blue light only.

ORTHOCHROMATIC FILM

Sensitive to ultraviolet radiation to blue, green and red light or all colors.

PANCHROMATIC FILM

Sensitive to ultraviolet rays to blue, green, red light and infra-red rays.

INFRARED FILM

The different classifications of films as according to its spectral sensitivity are:

BLUE SENSITIVE FILM, ORTHOCHROMATIC FILM, PANCHROMATIC FILM, INFRARED FILM

This refers to the size of the metallic silver grains that are formed after development of an exposed film.

GRANULARITY OR GRAININESS

It consists of seven (7) layers. A multi-layer emulsion coated on same support or base. The top emulsion is sensitive to blue light only. Since green and red light passes through it without effect, the blue light alone makes the exposure. A yellow filter layer above the middle vision absorbs and unused blue light and prevents it from reaching the two lower emulsion layer.

COLOR FILM

are basically composed of a light sensitive coating (emulsion) on a paper base or support. The emulsion suspended on a halide salts. gelatin is generally made of silver To withstand the rigors of soaking in chemical solution and water during processing and washing, as well as the variety of degree in humidity and temperature, the base is made of wood pulp.

PHOTOGRAPHIC PAPER

has a slow speed and is suited for contact printing

CHLORIDE PAPER

has a fast speed and is recommended for projection printing or enlarging

BROMIDE PAPER

a multi-speed and could be used in bath contact printing and enlarging

CHLORO BROMIDE PAPER

generally, photographic papers do not have wide exposure latitude so exposure must be critical at all times.

EXPOSURE LATITUDE

papers that do not change appreciable in contrast and image tone with reasonable variations in development has good latitude.

DEVELOPMENT LATITUDE

In black arid white printing, it is Often necessary to adjust the paper contrast so they can yield a natural scene result contra from negatives with density range that are either too low or too high.

CONTRAST GRADE OR RANGE

The observable features of a person or object that make them recognizable

PHYSICAL CHARACTERISTICS

vary in surface texture or degrees gloss or sheen. They are the glossy and smooth, semi matte or silk, and the matte or the rough surface.

SURFACES OF PHOTOGRAPHIC PAPER

weight or thickness. Under this category, we have the light weight, single weight, medium weight, and the double weight.

BASE

maybe "cold" or white with a very slight blue cast, and the "warm" or "cream" where the white light has a slight yellow brown line.

COLOR

It is that sensitized material that will record the visible image in the final development and become the photograph.

PHOTOGRAPHIC PAPER

used for contact printing, the size of the positive print is the same as the size of the negative used. Sensitivity to light is low and give blue-black tones when properly developed.

SILVER CHLORIDE PAPER

used projection, printing and enlarging process. This is one of the most ideal photo paper used for police photography. Will give a black tone when properly developed.

SILVER BROMIDE PAPER

Used both for projection and contact printing. Slow emulsion.

SILVER CHLOROBROMIDE PAPER

combines the contrast range in one paper it uses a special chlorobromide emulsion that produces varying contrast responses upon exposure to different colors of light.

VARIABLE CONTRACT PAPER

Types of photographic papers according to emulsion used

SILVER CHLORIDE PAPER, SILVER BROMIDE PAPER, SILVER CHLOROBROMIDE PAPER, VARIABLE CONTACT PAPER

Types of photographic papers according to physical characteristics

WEIGHT, SURFACE TEXTURE, COLOR

Types of photographic papers according to Contrast

VELOX NO 0, VELOX NO 1, VELOX NO 2, VELOX NO 3, VELOX NO 4, VELOX NO 5

designed for high flexibility and when paper thickness is not of consideration. Intended for purposes, which involves folding.

LIGHT WEIGHT

papers used for small prints or which are need to be mounted on solid and fine details necessary in the production. Used in ordinary photographic purposes.

SINGLE WEIGHT

Generally used for large prints because they stand up under rough treatment.

DOUBLE WEIGHT

designed for fine details and brilliant image formation.

GLOSSY PAPER

obscure the fine details

SEMI MATE PAPER

Used for large prints or where breath rather than detail is necessary

ROUGH PAPER

better used in police photography.

WHITE

Preferred for pictorial effect, portraits, landscape or when warmth effect is desired.

CREAM

Prepare for tone prints

BUFF PAPER

Used for printing extremely contrast negative or extremely exposed film.

VELOX NO 0

Used for high contrast negative (over exposed film)

VELOX NO 1

Used for normal exposed film

VELOX NO 2

Used for negative with weak contrast (under exposed)

VELOX NO 3

used to provide sufficient contrast to compensate for very thin or weak negatives. It is useful imprinting which high contrast is desired.

VELOX NO 4

For flat negative

VELOX NO 5

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LEA 103

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FORENSIC LIGHT

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Question list

SUPER FAST FILM

The ability to detect light or other signals as a function of their wavelength or frequency

SPECTRAL SENSITIVITY

rays and blue light only. sensitive to ultraviolet

BLUE SENSITIVE FILM

film-sensitive to ultraviolet rays and blue light only.

ORTHOCHROMATIC FILM

Sensitive to ultraviolet radiation to blue, green and red light or all colors.

PANCHROMATIC FILM

Sensitive to ultraviolet rays to blue, green, red light and infra-red rays.

INFRARED FILM

The different classifications of films as according to its spectral sensitivity are:

BLUE SENSITIVE FILM, ORTHOCHROMATIC FILM, PANCHROMATIC FILM, INFRARED FILM

This refers to the size of the metallic silver grains that are formed after development of an exposed film.

GRANULARITY OR GRAININESS

COLOR FILM

PHOTOGRAPHIC PAPER

has a slow speed and is suited for contact printing

CHLORIDE PAPER

has a fast speed and is recommended for projection printing or enlarging

BROMIDE PAPER

a multi-speed and could be used in bath contact printing and enlarging

CHLORO BROMIDE PAPER

generally, photographic papers do not have wide exposure latitude so exposure must be critical at all times.

EXPOSURE LATITUDE

papers that do not change appreciable in contrast and image tone with reasonable variations in development has good latitude.

DEVELOPMENT LATITUDE

In black arid white printing, it is Often necessary to adjust the paper contrast so they can yield a natural scene result contra from negatives with density range that are either too low or too high.

CONTRAST GRADE OR RANGE

The observable features of a person or object that make them recognizable

PHYSICAL CHARACTERISTICS

vary in surface texture or degrees gloss or sheen. They are the glossy and smooth, semi matte or silk, and the matte or the rough surface.

SURFACES OF PHOTOGRAPHIC PAPER

weight or thickness. Under this category, we have the light weight, single weight, medium weight, and the double weight.

BASE

maybe "cold" or white with a very slight blue cast, and the "warm" or "cream" where the white light has a slight yellow brown line.

COLOR

It is that sensitized material that will record the visible image in the final development and become the photograph.

PHOTOGRAPHIC PAPER

used for contact printing, the size of the positive print is the same as the size of the negative used. Sensitivity to light is low and give blue-black tones when properly developed.

SILVER CHLORIDE PAPER

used projection, printing and enlarging process. This is one of the most ideal photo paper used for police photography. Will give a black tone when properly developed.

SILVER BROMIDE PAPER

Used both for projection and contact printing. Slow emulsion.

SILVER CHLOROBROMIDE PAPER

combines the contrast range in one paper it uses a special chlorobromide emulsion that produces varying contrast responses upon exposure to different colors of light.

VARIABLE CONTRACT PAPER

Types of photographic papers according to emulsion used

SILVER CHLORIDE PAPER, SILVER BROMIDE PAPER, SILVER CHLOROBROMIDE PAPER, VARIABLE CONTACT PAPER

Types of photographic papers according to physical characteristics

WEIGHT, SURFACE TEXTURE, COLOR

Types of photographic papers according to Contrast

VELOX NO 0, VELOX NO 1, VELOX NO 2, VELOX NO 3, VELOX NO 4, VELOX NO 5

designed for high flexibility and when paper thickness is not of consideration. Intended for purposes, which involves folding.

LIGHT WEIGHT

papers used for small prints or which are need to be mounted on solid and fine details necessary in the production. Used in ordinary photographic purposes.

SINGLE WEIGHT

Generally used for large prints because they stand up under rough treatment.

DOUBLE WEIGHT

designed for fine details and brilliant image formation.

GLOSSY PAPER

obscure the fine details

SEMI MATE PAPER

Used for large prints or where breath rather than detail is necessary

ROUGH PAPER

better used in police photography.

WHITE

Preferred for pictorial effect, portraits, landscape or when warmth effect is desired.

CREAM

Prepare for tone prints

BUFF PAPER

Used for printing extremely contrast negative or extremely exposed film.

VELOX NO 0

Used for high contrast negative (over exposed film)

VELOX NO 1

Used for normal exposed film

VELOX NO 2

Used for negative with weak contrast (under exposed)

VELOX NO 3

used to provide sufficient contrast to compensate for very thin or weak negatives. It is useful imprinting which high contrast is desired.

VELOX NO 4

For flat negative

VELOX NO 5