11. Intangible assets
| (thousands of €) | In process | Software & | Brands, licenses, patents & know-how | Total | 
| Acquisition value | 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | 
 | 
 | 
| On 1 January 2017 | 5,561 | 7,185 | 1,523 | 14,269 | 
| Additions | 1,500 | 623 | 2 | 2,125 | 
| Sales and disposals | 
 | (100) | 
 | (100) | 
| Translation differences | 
 | (212) | 
 | (212) | 
| On 31 December 2017 | 7,061 | 7,496 | 1,525 | 16,082 | 
| Additions | 
 | 1,561 | 1,763 | 3,325 | 
| Sales and disposals | (7,061) | (20) | (569) | (7,650) | 
| Translation differences | 
 | 74 | 
 | 74 | 
| On 31 December 2018 | – | 9,111 | 2,719 | 11,832 | 
| 
 | 
 | 
 | 
 | 
 | 
| Amortization and impairment | 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | 
 | 
 | 
| On 1 January 2017 | 5,561 | 6,182 | 1,501 | 13,246 | 
| Amortization | 
 | 644 | 8 | 652 | 
| Sales and disposals | 
 | (99) | 
 | (99) | 
| Translation differences | 
 | (212) | 
 | (212) | 
| On 31 December 2017 | 5,561 | 6,514 | 1,509 | 13,587 | 
| Amortization | 417 | 681 | 9 | 1,107 | 
| Impairment | 1,083 | 
 | 
 | 1,083 | 
| Sales and disposals | (7,061) | (20) | (569) | (7,650) | 
| Translation differences | 
 | 74 | 
 | 74 | 
| On 31 December 2018 | – | 7,250 | 949 | 8,200 | 
| 
 | 
 | 
 | 
 | 
 | 
| Carrying amount | 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | 
 | 
 | 
| On 31 December 2017 | 1,500 | 982 | 16 | 2,495 | 
| On 31 December 2018 | – | 1,862 | 1,771 | 3,632 | 
The intangible assets increased by €1.1 million from €2.5 million at 31 December 2017, to €3.6 million at 31 December 2018. The amortization of €1.1 million and the impairment of €1.1 million were fully compensated by new additions for €3.3 million.
On 31 December 2018, our balance sheet did not hold any internally generated assets capitalized as intangible asset.