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Filling the tank with 20 ml allows for a reliable mist of about 10 ml. Expect a loss of 8–10 ml in the system due to internal volume.
Can BLUESPRAY® be used on horizontal surfaces?
Yes. BLUESPRAY® can be tilted over 45° without affecting spray quality.
It ensures continuous, even distribution of a fine mist on flat or overhead surfaces.
The device ensures consistent spray quality at angles up to 45°, making it ideal for treating complex surfaces and achieving optimal distribution of the reagent.
What is the propulsion capacity of a BLUESPRAY® refill?
The BLUESPRAY® pressure reserve allows for up to 2.5 full sprays of one 125 ml BLUESTAR® Magnum bottle.
Total capacity: up to 300 ml (10 oz).
How long should I wait before reading a BLUESTAR® Identi-PSA® test?
Results should be read after 10 minutes. Do not interpret the test after 15 minutes.
Refer to the user guide for full instructions.
Does BLUESTAR® Identi-PSA® require special storage conditions?
Yes. Store in a dry place at temperatures between 39°F and 86°F (4°C to 30°C).
Will BLUESTAR® Identi-HEM® react with synthetic blood?
No. It only gives a positive result in the presence of human hemoglobin. It does not detect synthetic or animal blood.
Can I use BLUESTAR® Identi-HEM® after applying BLUESTAR® Forensic multiple times?
Yes. You can apply BLUESTAR® Forensic several times to a suspected blood trace and still obtain valid results with BLUESTAR® Identi-HEM®.
How long is a sample stable after collection with Identi-HEM®?
Once collected, the sample remains stable at room temperature (4°C to 30°C), but should be ideally tested within 7 days.
Does BLUESTAR® Identi-HEM® require special storage conditions?
Yes. Store in a dry environment at temperatures between 39°F and 86°F (4°C to 30°C).
What are the differences between BLUESTAR® OBTI and BLUESTAR® Identi-HEM®?
- Sensitivity:
- OBTI: 0.05 µg/mL
- Identi-HEM®: 0.01 µg/mL (higher sensitivity)
- Specificity:
- Identi-HEM® reacts to certain animal blood, especially from the mustelid family (e.g., martens, polecats).
- Packaging:
- Identi-HEM® includes a sterile swab for sample collection.
- OBTI uses an attached piece inside the cap of collection tube.
- Shelf life:
- OBTI: 18 months from factory dispatch
- Identi-HEM®: 36 months from factory dispatch
Will BLUESTAR® OBTI react with synthetic blood?
No. BLUESTAR® OBTI only reacts to human hemoglobin and does not detect synthetic or animal blood.
Can I use BLUESTAR® OBTI after applying BLUESTAR® Forensic several times on the same area?
Yes. Multiple BLUESTAR® Forensic sprays do not prevent you from getting reliable results with BLUESTAR® OBTI.
How long does it wait to read an OBTI test ?
- A positive result usually appears within 3 to 10 minutes after activating the test.
- After 10 minutes, a test can be considered negative if no second line appears.
Refer to the user manual for detailed instructions.
Does BLUESTAR® OBTI require special storage conditions?
Yes. Store in a dry place at temperatures between 39°F and 86°F (4°C to 30°C).
What are the differences between BLUESTAR® OBTI and BLUESTAR® Identi-HEM®?
- Sensitivity:
- OBTI: 0.05 µg/mL
- Identi-HEM®: 0.01 µg/mL (more sensitive)
- Specificity:
- Identi-HEM® reacts to certain animal blood, especially from the mustelid family (e.g., martens, polecats).
- Packaging:
- Identi-HEM® is supplied with a sterile swab.
- OBTI uses an attached piece inside the cap of the collection tube.
- Shelf life:
- OBTI: 18 months from factory dispatch
- Identi-HEM®: 36 months from factory dispatch
What does the acronym “OBTI” stand for?
OBTI stands for Occult Blood Test Immunochromatographic.
> How can I perform a positive control test before using BLUESTAR® Forensic?
You can apply the reagent to a bloodstained cloth. It will produce a positive luminescent reaction with human or animal blood.
> What does a false positive look like ?
False positives may occur with certain substances such as varnish, some acrylic paints, and bleach. However, with experience, a technician can easily distinguish them from true blood reactions. The luminescence from false positives is usually weaker and shorter.
> How should I clean a surface after using BLUESTAR® Forensic?
Use a soapy sponge to wash the surface, followed by a clean damp sponge to remove any soap residue.
> Does BLUESTAR® Forensic leave stains after use?
It may leave invisible residues. Clean the surface with water and a sponge or washcloth after application.
> Will BLUESTAR® Forensic detect all types of blood?
Yes. It reacts with any blood containing hemoglobin — human, animal, or even insect (e.g., mosquito).
> Does BLUESTAR® Forensic react with synthetic blood?
Yes. BLUESTAR® Forensic reacts with human and animal hemoglobin, as well as synthetic blood containing hemoglobin.
> How long does the chemiluminescence last after spraying?
The reaction is immediate and lasts from 30 seconds to 2 minutes, depending on the substrate and blood dilution.
> How long is the active life of BLUESTAR® Forensic once mixed ?
- Kit : 24 hours minimum
- Mini Kit : 3 hours minimum
- Magnum : 24 hours minimum
- Tablets : 3 hours minimum
- Training Tablets : 3 hours minimum
> What is the shelf life of BLUESTAR® Forensic ?
- Mini Kit: 3 years
- Kit: 4 years
- Mini Training Kit: 3 years
- Magnum: 4 years
- Tablets (4 & 8 applications): 4 years
- Training Tablets (4 & 8 applications): 3 years
How long does BLUESTAR® Forensic remain active after mixing?
- Kit: Minimum 24 hours
- Mini Kit: Minimum 3 hours
- Magnum: Minimum 24 hours
- Tablets (4 or 8): Minimum 3 hours
- Training versions: Minimum 3 hours
> Does BLUESTAR® Forensic require special storage conditions ?
Yes. Store in a dry place at temperatures between 39°F and 86°F (4°C to 30°C).
> What is the detection limit of the BLUESTAR® Forensic?
The reagent can detect blood diluted up to 1:100,000.
> Does BLUESTAR® Forensic react on ancient blood ?
Yes. BLUESTAR® Forensic can reveal very old blood traces. It has been successfully used on samples over 7,000 years old. It is also commonly used to detect bloodstains that are more than 20 years old.