DFO stock solution

Purpose

Develop sweat fingerprints and blood fingerprints on porous surface, especially for sweat fingerprints on complex background. First, develop the fingerprints with DFO; if the result is unsatisfactory, improve it with ninhydrin.

Description

The DFO solution is composed of solution A and solution B. Seal the prepared solution A in an ampule, and encapsulate the ampule with a plastic sleeve. When using, mix solution A and solution B (trichlorotrifluoroethane or petroleum ether) in proportion. Solution A can be stored for several years.

Specifications

Method

Crush the ampule with special pliers or hammer, then the solution flows out but is still sealed in the plastic sleeve. Then, cut the top of the plastic sleeve with scissors. Pour 11ml of the solution in a small beaker, then add 39ml of trichlorotrifluoroethane or petroleum ether to prepare 50ml of DFO working solution. Put the working solution into the tray to develop the fingerprints on the paper. 50ml of DFO working solution can develop 5 A4 papers.

Development effect

Many comparative experiments have shown that the detection rate of fingerprints development with DFO is higher than that of ninhydrin.

Crush the ampule with special pliers or hammer

Cut the top of the plastic sleeve with scissors

Pour DFO in a small beaker

Add petroleum ether with boiling point of 30-60 to prepare 50ml solution

Saturate the exhibit with the prepared solution

Put the volatilized exhibit into the DFO fuming chamber for treatment

Fluorescence effect of combination of 530nm pbotostimulate luminescence and 530nm receiving filter

Fluorescence effect of combination of 530nm pbotostimulate luminescence and 530nm receiving filter

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.