Create a Cosmetic Product Safety Report for a Product made with a Naturallythinking Cosmetic Base

What types of products can I have assessed with this NT Base CPSR

Our NT Base CPSR is designed to order a Cosmetic Product Safety Report for a product that is made from a Naturallythinking Cosmetic Base. It is a very affordable way to produce a CPSR for a water based product without the lengthy process and expensive costs of P.E.T Testing.

Examples of products covered by this CPSR (but not exhausted to)

  • Shower Gel
  • Shampoo
  • Face Wash
  • Creams, Butters, Cleansers
  • Exfoliates
  • Hair Conditioner

What to expect from the Naturallythinking CPSR service

We aim to deliver all CPSR's by email within 7 working days... sooner if possible, providing you give us all the information required at the time of placing your order. If any information is missing this can extend our delivery aim time.

Once we receive your order you will receive an email with your order confirmation. Please use the reference on the order confirmation in any correspondence with us.

Once you have received this confirmation we are afraid we cannot make any changes to your submitted formula.

What Information do I need to have to hand?

Making sure you have all the information you need to hand will save you time and make life easy when completing the form.

You will need to know:

  • The name of your product
  • Purpose of your product
  • The address and telephone details of the Responsible Person for your product (see below for a description of the responsible person)
  • The ingredients and the percentage of each ingredient in your product (see below if you need any help with percentages)
  • Ensure that all your percentages add up to 100%
  • Know the packaging you will be putting your product in, including the closure. You will need to know the material the packaging is made from (see the packaging section below if you are unsure of anything about your packaging)

The biggest reason for delays or rejections with the compilation of your CPSR is incomplete information (for example no packaging information), your percentages not adding up to 100% or there being no Vitamin E added when the formulation contains essential oils.

To ensure you CPSR is completed quickly and without problem, please make sure the information above is included and correct.

What are the limits I need to work within?

If you make your product using Naturallythinking cosmetic bases we can produce your legal paperwork (CPSR) for you very quickly and affordably without expensive testing.

This is for products that that are made with Naturallythinking Cosmetic Bases (for example Shower Gel, Shampoo, Face Wash, Creams, Butters, Cleansers and exfoliates).

You can add a maximum of the following ingredients to our bases using this service:

2% Essential Oils (subject to any legal limitations on particular essential oils)

2% Actives (subject to any legal limitations on particular actives)

5% Carrier Oil

Don't forget if your product contains essential oils you will need to add at least 0.2% essential oil

We will assess the product to ensure all ingredients are within legal limits and if they are not will get back to you with suggestions on what you need to change to make your product legal.

What is a Responsible Person?

A responsible person is a person that is responsible for the legal obligations of your product. This will normally be yourself, but can also be a company.

For products sold in the UK, the responsible person needs to be based in the UK. For products sold in the EU, the responsible person needs to be within the EU.

Calculating Percentages

Credit to the Organic Chemistry Tutor (

How to calculate Percentages in your Cosmetic Product

For the purpose of cosmetic manufacture and producing your CPSR, it is best to use weight rather than volume for all your ingredients before calculating the percentages. This will create a consistent way of measuring your ingredients to calculate the percentages.

For example if we have the following recipe:

  • 15 drops Lavender Essential Oil
  • 30ml Olive Oil
  • 10ml Almond Oil
  • 5ml Jojoba Oil
  • 0.5ml Vitamin E

We first need to convert all of these to weight from volume

We do this by measuring our ingredients and then weighing each ingredient on scales.

Converted to grams our original formula is now:

  • 2.1g Lavender Essential Oil
  • 29g Olive Oil
  • 9.5g Almond Oil
  • 4.4g Jojoba Oil
  • 0.4g ml Vitamin E

Now that we have all of our ingredients, it is very easy to calculate the percentages.

Firstly we need to add up the total weight of all the ingredients: 45.4g

Then to work out the percentage each individual ingredient makes up we simply divide the ingredient weight by the total weight and then after times by 100.

So for our example above

Lavender Essential Oil: 2.1 / 45.4 = 0.0462

Olive Oil: 29 / 45.4 = 0.638

Almond Oil: 9.5 / 45.4 = 0.209

Jojoba Oil: 4.4 / 45.4 = 0.096

Vitamin E: 0.4 / 45.4 = 0.008

Now we multiply each of our results by 100

Lavender Essential Oil: 0.0462 x 100 = 4.62%

Olive Oil: 0.638 x 100 = 63.8%

Almond Oil: 0.209 x 100 = 20.9%

Jojoba Oil: 0.096 x 100 = 9.6%

Vitamin E: 0.008 x 100 = 0.8%

You can see that you now have the percentages of each ingredient in your product. It will now be easy to scale your production to any batch size you wish to.


Calculating Percentages a further guide

There are a few different ways that a percentage can be calculated. The following formula is a common strategy used to calculate the percentage of something:

1. Determine the whole or total amount of what you want to find a percentage for

For example, if you want to calculate the percentage of how many days it rained in a month, you would use the number of days in that month as the total amount. So, let's say we are evaluating the amount of rain during the month of April, which has 30 days.

2. Divide the number that you wish to determine the percentage for

Using the example above, let's say that it rained 15 days out of the 30 days in April. You would divide 15 by 30, which equals 0.5.

3. Multiply the value from step two by 100

Continuing with the above example, you would multiply 0.5 by 100. This equals 50, which would give you the answer of 50%. So, in April, it rained 50% of the time.

Types of percentage problems

There are three main types of percentage problems you might encounter in both personal and professional settings. These include:

Finding the ending number
Finding the percentage
Finding the starting number
1. Finding the ending number

The following is an example of a question that would require you to use a percentage calculation to find the ending number in a problem: "What is 50% of 25?" For this problem, you already have both the percentage and the whole amount that you want to find a percentage of.

So, you would move to the second step as listed in the previous section. However, since you already have the percentage, instead of dividing you will want to multiply the percentage by the whole number. For this equation, you would multiple 50%, or 0.5, by 25. This gives you an answer of 12.5. Thus, the answer to this percentage problem would be "12.5 is 50% of 25."

2. Finding the percentage

For a percentage problem in which you need to find the percentage, a question may be posed as the following: "What percent of 5 is 2?" In this example, you will need to determine in a percentage how much of 2 is part of the whole of 5. For this type of problem, you can simply divide the number that you want to turn into a percentage by the whole. So, using this example, you would divide 2 by 5. This equation would give you 0.4. You would then multiply 0.4 by 100 to get 40, or 40%. Thus, 2 is equal to 40% of 5.

3. Finding the starting number

A percentage problem that asks you to find the starting number may look like the following: "45% of what is 2?" This is typically a more difficult equation but can easily be solved using the previously mentioned formula. For this type of percentage problem, you would want to divide the whole by the percentage given. Using the example of "45% of what is 2?", you would divide 2 by 45% or .45. This would give you 4.4, which means that 2 is 45% of 4.4.

Your Packaging Options

If you purchase your packaging from Naturallythinking or from one of our approved suppliers, you simply need to select from the packaging dropdown box the type of packaging you are using.

You need to select both the Packaging Material and the Closure

Packaging Material dropdown

Select the type of material (Aluminium, Plastic or Glass and if appropriate colour). If your product is in plastic packaging, it is important to select the type of plastic the container is made from . The majority of plastic containers ar either PET or HDPE plastic.

Closure Material dropdown

Select the type of material (Plastic, Glass etc.) and the type of liner your closure has. The majority of closures are Aluminium or PP Plastic and may have a glass pipette. The majority of liners are either EPE/EPA or aluminium closures.

What if my packaging option isn't shown

Please select the closest packaging option from the dropdown. It is important that you obtain a foodsafe certificate from your packaging manufacture to verify its suitability with cosmetics. If your manufacturer has specific testing information for the product with Cosmetics, that is equally acceptable. It is important that you keep this information in your Product Information File as it verifies the compatibility and safety of the packaging you have ordered.