Answers to your most frequently asked questions



Can Biokap Nutricolor cause allergies?

Hair dyes can cause serious allergy reactions, for this reason we recommend to strictly follow the instructions.  As reported on the package,  do a sensitivity test 48 hours before every application. If you wish to know how to carry out the test, read the instructions on the internal leaflet carefully and also the FAQ section “Before applying the hair dye  – How to do the sensitivity test”.


I am allergic to nickel, can I use your hair dyes?

All products in the BioKap Nutricolor range are Nickel Tested as shown on each pack.

The finished products of all production batches are subjected to analysis, which has always shown a maximum amount of nickel far below the safe limit of 1 ppm 0.0001%), below which clinical trials have never shown an allergic reaction to this mineral. In any case, it is necessary to perform a patch test 48 hours before using the product.


What should I do in the event of an allergic reaction while applying the dye?

In case of an allergic reaction during application, as for instance intense itching, skin burning or skin rash, immediately stop using the product and immediately rinse with warm water. In this case, before applying a new dye, consult a Dermatologist.


I am allergic to nickel, can I use your hair dyes?

All products in the BioKap Nutricolor range are “Nickel Tested”, (link to the question above) as shown on each pack.
This means that the finished product from each production lot is subjected to analysis for nickel. In any case, it is necessary to carry out a sensitivity test 48 hours before using the product.


Can I use Biokap Nutricolor despite the fact that my hair are already dyed ?

Yes, it is possible to apply BioKap Nutricolor on already dyed hair. If you need to just touch up your roots, choose a colour that is similar to the one you already have.  If instead you want to change your present look , choose a darker colour than the one you already have.  If you have a high percentage of white hair,  apply a colour that is one tone darker than your hair in order to get a perfect coverage. Like all permanent hair dyes, we recommend to wait at least 4/5 weeks between one application and the next one.


Can I apply the dye after using henna or highlights?

It is first necessary to perform the patch test 48 hours before each application. The dye can be applied, but we cannot guarantee the colour result, because the previous treatment can alter the final colour of the first application compared to the desired one. Subsequent applications, one month apart, can help obtain the desired colour.We nevertheless recommend choosing shades that do not have red hues and testing a strand behind your neck to see the colouring result. We do not recommend the application of  BioKap Nutricolor Delicato + Hair Dye.


Are your dyes able to cover grey hair?

BioKap dyes provide coverage of grey hair from the first application. For best results we recommend the following:

– with less than 50% grey hair, use a shade similar to your own to maintain your colour
– with more than 50% grey hair, use a shade darker shade than your own to achieve your colour.


Can I use the dye on my eyebrows?

The product must NOT be used to dye eyelashes, eyebrows, beards and moustaches. It has been formulated specifically for hair colouring.


What should I do if I get the product in my eyes?

In this case, rinse immediately for a prolonged period with plenty of water.


How can I get rid of stains on my skin?

The dye will disappear after a few washes. To prevent stains, however, you can apply the protective cream supplied in the pack, or another oily cream, around the edge of the scalp.


Can I mix different shades together?

If you do not find among  Nutricolor e Nutricolor Delicato the color that better suits you, it is possible to mix the differnt colos among them.
Please note that  the new 4 BioKap Nutricolor Delicato + colors, on the other hand, MUST NOT BE mixed neither among them nor with any other color.

We remind you that any residual of hair dye that has been already mixed and is ready for use cannot be stored and used later. It is nevertheless essential to perform the patch test 48 hours before each application. This must be done, even if you have already used a colouring product from this or another brand, because individual sensitivity to the dyes may change over time. A preliminary test should be carried out to check the final colour. Proceed by mixing varying amounts, depending on the result to be obtained, from the chosen colour tubes in the same bottle of Nutrifix Colour Developer.


After how long is it advisable to repeat the application of the dye?

It is usually best to wait 5-6 weeks before repeating the application, but times may vary depending on the speed of hair growth.


How long should the dye be left on to develop?

For correct application, the development time is a total of 35 minutes. It is recommended to apply the dye on any regrowth, leaving it on for approximately 20 minutes, and then distribute it along the length of the hair, leaving it on for another 15 minutes.


How should the Lightening Cream be used?

The Lightening Cream should be applied in the same way as the BioKap Nutricolor Dye, with some small changes:

– to lighten hair by 1-2 shades: apply over the entire length of the hair, leaving it on for 30/40 minutes;
– for highlights: apply to small sections using the special applicator, wrap in aluminium foil and leave on for 30 minutes.

Some guidelines: if your natural colour is

– dark blonde, your hair will turn light blonde
– brown, your hair will turn light brown
– red, be careful as the colour could become orangey
– dark brown/black, application is not recommended.


I don’t like how the colour has turned out. How can I get my natural colour back?

If the chosen colour is one or two shades darker than your natural colour, you can lighten your hair using BioKap Nutricolor Delicate Lightening Cream. If the chosen colour is one or two shades darker, you can apply a darker shade of dye.Before doing any of this, it is advisable to wait 4-5 weeks from the first dye. If the chosen colour is much lighter or much darker, it is advisable to contact your hairdresser.


Can I colour my hair during pregnancy and while I am breastfeeding?

Regarding the use of our hair dyes during pregnancy, we recommend following the advice of your gynaecologist.

In fact, although the ingredients are selected to ensure high skin tolerance, we must consider that during pregnancy, skin is more sensitive, therefore there is an increased risk of sensitization or allergy, even in women who have never experienced this type of problem.

For this reason, we do not recommend using any hair dye in the first three months of pregnancy and, for the other months, we suggest you consult your gynaecologist:some recommend the use of natural dyes from the 4th month onwards, while others only after pregnancy and breastfeeding.


I have already used hair dyes without any allergic reaction, can I use BioKap Nutricolor?

Not without performing the patch test. Each dye is different and because there may be allergies to even the most innocuous products such as certain foods (nuts, tomatoes etc.), it is essential to perform the patch test 48 hours before each application. This must be done, even if you have already used a colouring product from this or another brand, because individual sensitivity to the dyes may change over time.


How do you perform the patch test?

Mix a small amount of BioKap Nutricolor Colouring Cream with an equal amount of Nutrifix Colour Developer lotion. As a container you can use a lid, a paper cup or a coffee cup.

Using a cotton bud, apply a small amount of the product behind the ear or in the crook of the elbow, enough to cover an area equal in size to about 1 cm square.

Repeat this two or three times, letting it dry in between. Close the colouring cream tube and the Nutrifix lotion bottle carefully, then wait 48 hours without washing, covering or touching the area.

If itching, redness or other skin abnormalities occur during this period, do not use the product and consult a dermatologist before using any other colouring product.

The patch test is a sensible precaution that can reduce, but not eliminate, the risk of an allergic reaction, even in the event of a negative result. If, after this period, no itching, redness or swelling is evident, apply the BioKap Nutricolor Dye product.


Are there situations where it is not recommended to use hair colouring products?

Hair colouring products must not be used if the user:

– has had a previous reaction to dyes;
– has a sensitive, irritated or damaged scalp or rashes on the face;
– has had a reaction to a temporary black henna tattoo.

In addition, these products are not intended to be used on persons under the age of 16.