A method for forming at least a first primary droplet onto a primary fibre, the method comprising - arranging a part of the primary fibre into a reserve of liquid or viscous polymer based material such that that the primary fibre extends through the reserve and on both sides of the reserve, and thereafter - during a first primary period of time (T 1,1), moving the primary fibre and/or the reserve relative to each other in a direction that has a component that is parallel to the length of the primary fibre such that a first part of the primary fibre moves out from the reserve with a first primary velocity (v 1,1), thereby forming a first primary layer of the liquid or viscous polymer based material onto the first part of the primary fibre, and thereafter - during a first secondary period of time (T 1,2), allowing the first primary layer of the liquid or viscous polymer based material to form a first primary droplet onto the primary fibre by o holding still the primary fibre relative to the reserve or o moving the primary fibre and/or the reserve relative to each other with a first secondary velocity (v 1,2) that is less than the first primary velocity (v 1,1), - selecting the first primary velocity (v 1,1) and/or the duration of the first primary period of time (T 1,1) in such a way that during the first secondary period of time (T 1,2), only one first primary droplet forms onto the primary fibre, - during a second primary period of time (T 2,1), moving the primary fibre and/or the reserve relative to each other such that a second part of the primary fibre moves out from the reserve with a second primary velocity (v 2,1), thereby forming a second primary layer of the liquid or viscous polymer based material onto the second part of the primary fibre, - during a second secondary period of time (T 2,2), allowing the second layer of the liquid or viscous polymer based material to form a second primary droplet onto the primary fibre by - holding still the primary fibre relative to the reserve or - moving the primary fibre and/or the reserve with a second secondary velocity (v 2,2) that is less than the second primary velocity (v 2,1), wherein - during the first primary period of time (T 1,1), the viscosity of the liquid or viscous polymer based material is in the range from 250 mPa.s to 50000 mPa.s as measured according to the standard EN ISO 2555:1999, and - the first primary velocity (v 1,1) is from 0.5 mm/s to 50 mm/s and wherein the primary fibre is moved with a component that is parallel to the length of the fibre during periods of time subsequent to the first primary period of time (T 1,1). - arranging a part of the primary fibre into a reserve of liquid or viscous polymer based material such that that the primary fibre extends through the reserve and on both sides of the reserve, and thereafter - during a first primary period of time (T 1,1), moving the primary fibre and/or the reserve relative to each other in a direction that has a component that is parallel to the length of the primary fibre such that a first part of the primary fibre moves out from the reserve with a first primary velocity (v 1,1), thereby forming a first primary layer of the liquid or viscous polymer based material onto the first part of the primary fibre, and thereafter - during a first secondary period of time (T 1,2), allowing the first primary layer of the liquid or viscous polymer based material to form a first primary droplet onto the primary fibre by o holding still the primary fibre relative to the reserve or o moving the primary fibre and/or the reserve relative to each other with a first secondary velocity (v 1,2) that is less than the first primary velocity (v 1,1), - selecting the first primary velocity (v 1,1) and/or the duration of the first primary period of time (T 1,1) in such a way that during the first secondary period of time (T 1,2), only one first primary droplet forms onto the primary fibre, - during a second primary period of time (T 2,1), moving the primary fibre and/or the reserve relative to each other such that a second part of the primary fibre moves out from the reserve with a second primary velocity (v 2,1), thereby forming a second primary layer of the liquid or viscous polymer based material onto the second part of the primary fibre, - during a second secondary period of time (T 2,2), allowing the second layer of the liquid or viscous polymer based material to form a second primary droplet onto the primary fibre by - holding still the primary fibre relative to the reserve or - moving the primary fibre and/or the reserve with a second secondary velocity (v 2,2) that is less than the second primary velocity (v 2,1), wherein - during the first primary period of time (T 1,1), the viscosity of the liquid or viscous polymer based material is in the range from 250 mPa.s to 50000 mPa.s as measured according to the standard EN ISO 2555:1999, and - the first primary velocity (v 1,1) is from 0.5 mm/s to 50 mm/s and wherein the primary fibre is moved with a component that is parallel to the length of the fibre during periods of time subsequent to the first primary period of time (T 1,1).