BTZZ-I Thermotropic fluorescence instrument for developing sweat fingerprint on paper

Purpose

Heat the paper with fingerprint to develop fingerprint in fluorescence.

Composition

Description

A. The fingerprint paper heater is composed of a moving tray, an infrared radiant heater and the control circuit. The moving tray carries the fingerprint paper to move slowly under the heater and receive heat radiation. The heating time and temperature can be set by the control circuit.

B. There are blue and green light sources in the observation box, and both light source output ports are equipped with band-pass interference barrier filters. At the top of the observation box, there is a rectangular observation hole for inserting barrier filter, and the fingerprint fluorescence can be observed through the barrier filter.

C. The camera is mounted on the camera stand, and the fingerprint fluorescence can be photographed through the barrier filter.

Working principle

When the amino acid in the fingerprint is heated to 180-210°C, its chemical structure changes and becomes fluorescent substance, which can be viewed with a 400-540nm light.

Specifications

Method

A. Switch on the heater, place the fingerprint paper on the moving tray, and set the heating temperature and the tray moving speed. Press the START button to start heating, and the tray will carry the paper to pass through under the heater. The temperature sensor measures the temperature in real time and controls the temperature to remain at the set temperature.

B. Place the heated paper into the fluorescence observation box, insert the blue barrier filter into the observation hole, turn on the blue light, and observe the fingerprint fluorescence through the barrier filter.

C. If the paper itself fluoresces and interferes with the fingerprint fluorescence, switch to green light. Insert the green barrier filter into the observation hole, turn on the green light, and observe the fingerprint fluorescence through the barrier filter. Most papers do not fluoresce with a 470-510nm light.

D. After a good fingerprint is observed, mount the camera onto the camera stand and photograph the fingerprint through the barrier filter.

Comparison of effects

A. A large number of comparative experiments have shown that, for fresh sweat fingerprint on paper, this method is more efficient than ninhydrin and is equivalent to DFO and 1,2-indanedione; for old sweat fingerprint on paper, this method is more efficient than ninhydrin, DFO and 1,2-indanedione.

B. The fingerprint developed with this device can be re-developed with ninhydrin, DFO, 1,2-indanedione or physical developer.

C. No need for complicated chemical treatment, fast (30-60 seconds) and damage-free development process, especially suitable for rapid processing of a large number of exhibits.

Product Application

Application areas for our products include crime scene investigation, fingerprint collection and development, footprint collection and development, tool marks collection, trace evidence collection, documents examination, forensic medical examination, forensic evidence collection, DNA collection, DNA disinfection, criminal photography, criminal investigation light source, narcotic drugs test, poison test, evidence packaging, evidence marking, crime scene plotting, crime scene protection, human body protection on crime scene.

Our Service

We can provide reliable product and service for you.

1. Q: Is it a reliable company?

A: Beijing Bulant Police Equipment Co.,Ltd. is a company specialized in forensic product, such as: crime scene investigation, trace detection, fingerprint development and extraction, footprint extraction, micro-evidence extraction, files & documents inspection, gunshots detection, forensic examine, DNA extraction, criminal photograph, forensic light source, alcohol test, traffic scene investigation, drug & poison examine, evidence packaging, consumables in lab, etc.

2. Q: What about the delivery?

A: We can offer the door to door services by air or by sea just depend on your actual request. Such as DHL, UPS, TNT, FEDEX…

3. Q: What is the package?

A: Aluminum alloy case/carton case/wooden case.

4. Q: Do you have any timely technology supports?

A: We have a professional technology supporting team for your timely services. We prepare the technical documents for you, also you can contact us by telephone, webcam, online chat (google talk, MSN, skype, yahoo).

5. Q: What is the payment method?

A: T/T, WESTERN UNION, MONEY GRAM, ESCROW, PAYPAL

6. Q: Do you take part in the world exhibition every year?

A: Yes, we took part in exhibitions every year since 2008.

Langfang Danmei security equipment Co., Ltd.established in 2012, 15 February, with registered capital of 22 million yuan, is located at Langfang City, Hebei Province. The company possesses four buildings, including production workshop, finished product warehouse, material warehouse and scientific research building, total area is 8934 square meters.

The company focus on development and manufacture criminal investigation equipment. We have a research and development team which has a full range of technical talents, including forensic science, machine design, machining, electronic circuit design, optical design, automatic control and chemical analysis.

After years of research and development, we have established a relatively complete criminal investigation equipment product system. The products application area includes fingerprint collection and examination, footprint collection and examination, tool marks collection, trace evidence collection, document examination, cartridge marks collection，forensic medical examination, forensic evidence collection, DNA collection, DNA disinfection, criminal photography, criminal investigation light source, narcotic drugs test, poison test, evidence packaging, evidence marking, crime scene plotting, crime scene protection, human body protection on crime scene.