| 
       in CHF 1 000  | 
    
       Notes  | 
    
       
  | 
    
       January–June 2022  | 
    
       
  | 
    
       January–June 2021  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Net income  | 
    
       
  | 
    
       
  | 
    
       43 803  | 
    
       
  | 
    
       41 889  | 
  
| 
       Income taxes  | 
    
       
  | 
    
       
  | 
    
       9 546  | 
    
       
  | 
    
       8 886  | 
  
| 
       Depreciation of property, plant and equipment and intangible assets  | 
    
       
  | 
    
       
  | 
    
       15 288  | 
    
       
  | 
    
       17 639  | 
  
| 
       Other non-cash items  | 
    
       
  | 
    
       
  | 
    
       2 070  | 
    
       
  | 
    
       (1 993)  | 
  
| 
       Loss/profit from the disposal of property, plant and equipment  | 
    
       
  | 
    
       
  | 
    
       (7)  | 
    
       
  | 
    
       (111)  | 
  
| 
       Change in trade receivables  | 
    
       
  | 
    
       
  | 
    
       (24 262)  | 
    
       
  | 
    
       (24 933)  | 
  
| 
       Change in inventories  | 
    
       
  | 
    
       
  | 
    
       (15 745)  | 
    
       
  | 
    
       (18 624)  | 
  
| 
       Change in other receivables and accrued income  | 
    
       
  | 
    
       
  | 
    
       (4 863)  | 
    
       
  | 
    
       (4 523)  | 
  
| 
       Change in trade payables  | 
    
       
  | 
    
       
  | 
    
       5 583  | 
    
       
  | 
    
       15 268  | 
  
| 
       Change in other liabilities and accrued liabilities  | 
    
       
  | 
    
       
  | 
    
       10 960  | 
    
       
  | 
    
       17 015  | 
  
| 
       Change in provisions  | 
    
       
  | 
    
       
  | 
    
       (812)  | 
    
       
  | 
    
       1 086  | 
  
| 
       Income tax paid  | 
    
       
  | 
    
       
  | 
    
       (10 163)  | 
    
       
  | 
    
       (8 188)  | 
  
| 
       Interest paid  | 
    
       
  | 
    
       
  | 
    
       (146)  | 
    
       
  | 
    
       (216)  | 
  
| 
       Cash flow from operating activities  | 
    
       
  | 
    
       
  | 
    
       31 252  | 
    
       
  | 
    
       43 195  | 
  
| 
       Purchases of property, plant and equipment  | 
    
       
  | 
    
       
  | 
    
       (21 580)  | 
    
       
  | 
    
       (13 969)  | 
  
| 
       Proceeds from sale of property, plant and equipment  | 
    
       
  | 
    
       
  | 
    
       49  | 
    
       
  | 
    
       355  | 
  
| 
       Purchases of intangible assets  | 
    
       
  | 
    
       
  | 
    
       (4 333)  | 
    
       
  | 
    
       (3 109)  | 
  
| 
       Purchases and disposals of financial assets  | 
    
       
  | 
    
       
  | 
    
       (172)  | 
    
       
  | 
    
       20  | 
  
| 
       Interest received  | 
    
       
  | 
    
       
  | 
    
       727  | 
    
       
  | 
    
       951  | 
  
| 
       Cash outflow from acquisition  | 
    
       3  | 
    
       
  | 
    
       (243)  | 
    
       
  | 
    
       (1 276)  | 
  
| 
       Cash flow from investing activities  | 
    
       
  | 
    
       
  | 
    
       (25 552)  | 
    
       
  | 
    
       (17 028)  | 
  
| 
       Payment of dividend  | 
    
       
  | 
    
       
  | 
    
       (38 243)  | 
    
       
  | 
    
       (25 315)  | 
  
| 
       Payment of dividend to minority interests  | 
    
       
  | 
    
       
  | 
    
       –  | 
    
       
  | 
    
       (533)  | 
  
| 
       Purchase of treasury shares 1)  | 
    
       
  | 
    
       
  | 
    
       (40 625)  | 
    
       
  | 
    
       (3 609)  | 
  
| 
       Repayment of short-term financial liabilities  | 
    
       
  | 
    
       
  | 
    
       –  | 
    
       
  | 
    
       (324)  | 
  
| 
       Cash flow from financing activities  | 
    
       
  | 
    
       
  | 
    
       (78 868)  | 
    
       
  | 
    
       (29 781)  | 
  
| 
       Effect of exchange rate changes on cash  | 
    
       
  | 
    
       
  | 
    
       (920)  | 
    
       
  | 
    
       2 815  | 
  
| 
       Net change in cash and cash equivalents  | 
    
       
  | 
    
       
  | 
    
       (74 088)  | 
    
       
  | 
    
       (799)  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Cash and cash equivalents at 1.1.  | 
    
       
  | 
    
       
  | 
    
       219 845  | 
    
       
  | 
    
       203 556  | 
  
| 
       Cash and cash equivalents at 30.6.  | 
    
       
  | 
    
       
  | 
    
       145 757  | 
    
       
  | 
    
       202 757  | 
  
| 
       Net change in cash and cash equivalents  | 
    
       
  | 
    
       
  | 
    
       (74 088)  | 
    
       
  | 
    
       (799)  | 
  
The notes are an integral part of the consolidated financial statements.